diff --git a/app/api/users/deleteAccount/route.ts b/app/api/users/deleteAccount/route.ts
index f5091a6..c2f0aee 100644
--- a/app/api/users/deleteAccount/route.ts
+++ b/app/api/users/deleteAccount/route.ts
@@ -23,7 +23,7 @@ export async function DELETE(req: Request) {
     }
 
     // Respond with a success message
-    return NextResponse.json({ message: "Account successfully deleted" }, { status: 200 });
+    return NextResponse.json({ success: true, message: "Account successfully deleted" }, { status: 200 });
   } catch (error) {
     console.error("Error deleting account:", error);
     return NextResponse.json({ error: "Server error" }, { status: 500 });
diff --git a/dbConfig.ts b/dbConfig.ts
index d47bb00..28d4c46 100644
--- a/dbConfig.ts
+++ b/dbConfig.ts
@@ -1,27 +1,26 @@
-// dbConfig.ts - establish a connection to a MongoDB database
-import mongoose from 'mongoose';
+// dbConfig.ts
+import mongoose from "mongoose";
 
-export async function connect() {
-    try {
-        if (!process.env.MONGO_DB_URL) {
-            throw new Error("MONGO_DB_URL is not defined. Check your environment variables.");
-        }
+let isConnected = false; // track connection status
 
-        await mongoose.connect(process.env.MONGO_DB_URL, {
-        } as mongoose.ConnectOptions);
+export async function connect() {
+  if (isConnected) return; // singleton pattern
 
-        const connection = mongoose.connection;
+  const uri = process.env.MONGO_DB_URL;
+  if (!uri) throw new Error("MONGO_DB_URL is not defined");
 
-        connection.on('connected', () => {
-            console.log("MongoDB connected successfully");
-        });
+  try {
+    await mongoose.connect(uri);
+    console.log("MongoDB connected");
+    isConnected = true;
+  } catch (err) {
+    console.error("MongoDB connection error:", err);
+    throw err;
+  }
+}
 
-        connection.on('error', (err) => {
-            console.error("MongoDB connection error:", err);
-            process.exit(1);
-        });
-    } catch (error) {
-        console.error("MongoDB connection failed:", error);
-        process.exit(1);
-    }
+export async function disconnect() {
+  if (!isConnected) return;
+  await mongoose.disconnect();
+  isConnected = false;
 }
diff --git a/jest.config.js b/jest.config.js
index f387b44..c4610c6 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -8,4 +8,10 @@ module.exports = {
         '^.+\\.tsx?$': 'ts-jest',
     },
     moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx'],
+
+    moduleNameMapper: {
+        '^@/(.*)$': '<rootDir>/$1', // Map @/ to the project root
+      },
+      
+      setupFilesAfterEnv: ["<rootDir>/tests/setup.ts"],
 };
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 12010f2..47e0c0b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,13 +33,17 @@
         "@types/nodemailer": "^6.4.17",
         "@types/react": "^19",
         "@types/react-dom": "^19",
+        "@types/supertest": "^6.0.3",
         "eslint": "^9",
         "eslint-config-next": "15.1.2",
         "jest": "^30.1.3",
         "jest-junit": "^16.0.0",
+        "mongodb-memory-server": "^10.2.1",
+        "next-test-api-route-handler": "^5.0.3",
         "postcss": "^8",
+        "supertest": "^7.1.4",
         "tailwindcss": "^3.4.1",
-        "ts-jest": "^29.4.1",
+        "ts-jest": "^29.4.4",
         "typescript": "^5"
       }
     },
@@ -641,6 +645,20 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@envelop/instrumentation": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@envelop/instrumentation/-/instrumentation-1.0.0.tgz",
+      "integrity": "sha512-cxgkB66RQB95H3X27jlnxCRNTmPuSTgmBAq6/4n2Dtv4hsk4yz8FadA1ggmd0uZzvKqWD6CR+WFgTjhDqg7eyw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@whatwg-node/promise-helpers": "^1.2.1",
+        "tslib": "^2.5.0"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.1.tgz",
@@ -779,6 +797,13 @@
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
+    "node_modules/@fastify/busboy": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@fastify/busboy/-/busboy-3.2.0.tgz",
+      "integrity": "sha512-m9FVDXU3GT2ITSe0UaMA5rU3QkfC/UXtCU8y0gSN/GugTqtVldOBWIB5V6V3sbmenVZUIpU6f+mPEO2+m5iTaA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@humanfs/core": {
       "version": "0.19.1",
       "resolved": "https://registry.npmjs.org/@humanfs/core/-/core-0.19.1.tgz",
@@ -1989,6 +2014,19 @@
         "node": ">= 10"
       }
     },
+    "node_modules/@noble/hashes": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
+      "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^14.21.3 || >=16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -2033,6 +2071,16 @@
         "node": ">=12.4.0"
       }
     },
+    "node_modules/@paralleldrive/cuid2": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/@paralleldrive/cuid2/-/cuid2-2.2.2.tgz",
+      "integrity": "sha512-ZOBkgDwEdoYVlSeRbYYXs0S9MejQofiVYoTbKzy/6GQa39/q5tQU2IX46+shYnUkpEl3wc+J6wRlar7r2EK2xA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.1.5"
+      }
+    },
     "node_modules/@pkgjs/parseargs": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
@@ -2166,6 +2214,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/cookiejar": {
+      "version": "2.1.5",
+      "resolved": "https://registry.npmjs.org/@types/cookiejar/-/cookiejar-2.1.5.tgz",
+      "integrity": "sha512-he+DHOWReW0nghN24E1WUqM0efK4kI9oTqDm6XmK8ZPe2djZ90BSNdGnIyCLzCPw7/pogPlGbzI2wHGGmi4O/Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/dotenv": {
       "version": "6.1.1",
       "resolved": "https://registry.npmjs.org/@types/dotenv/-/dotenv-6.1.1.tgz",
@@ -2243,6 +2298,13 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/methods": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/@types/methods/-/methods-1.1.4.tgz",
+      "integrity": "sha512-ymXWVrDiCxTBE3+RIrrP533E70eA+9qu7zdWoHuOmGujkYtzf4HQF96b8nwHLqhuf4ykX61IGRIB38CC6/sImQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/node": {
       "version": "20.17.10",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-20.17.10.tgz",
@@ -2287,6 +2349,30 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/superagent": {
+      "version": "8.1.9",
+      "resolved": "https://registry.npmjs.org/@types/superagent/-/superagent-8.1.9.tgz",
+      "integrity": "sha512-pTVjI73witn+9ILmoJdajHGW2jkSaOzhiFYF1Rd3EQ94kymLqB9PjD9ISg7WaALC7+dCHT0FGe9T2LktLq/3GQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/cookiejar": "^2.1.5",
+        "@types/methods": "^1.1.4",
+        "@types/node": "*",
+        "form-data": "^4.0.0"
+      }
+    },
+    "node_modules/@types/supertest": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/@types/supertest/-/supertest-6.0.3.tgz",
+      "integrity": "sha512-8WzXq62EXFhJ7QsH3Ocb/iKQ/Ty9ZVWnVzoTKc9tyyFRRF3a74Tk2+TLFgaFFw364Ere+npzHKEJ6ga2LzIL7w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/methods": "^1.1.4",
+        "@types/superagent": "^8.1.0"
+      }
+    },
     "node_modules/@types/webidl-conversions": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/@types/webidl-conversions/-/webidl-conversions-7.0.3.tgz",
@@ -2820,6 +2906,80 @@
         "win32"
       ]
     },
+    "node_modules/@whatwg-node/disposablestack": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/@whatwg-node/disposablestack/-/disposablestack-0.0.6.tgz",
+      "integrity": "sha512-LOtTn+JgJvX8WfBVJtF08TGrdjuFzGJc4mkP8EdDI8ADbvO7kiexYep1o8dwnt0okb0jYclCDXF13xU7Ge4zSw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@whatwg-node/promise-helpers": "^1.0.0",
+        "tslib": "^2.6.3"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "node_modules/@whatwg-node/fetch": {
+      "version": "0.10.11",
+      "resolved": "https://registry.npmjs.org/@whatwg-node/fetch/-/fetch-0.10.11.tgz",
+      "integrity": "sha512-eR8SYtf9Nem1Tnl0IWrY33qJ5wCtIWlt3Fs3c6V4aAaTFLtkEQErXu3SSZg/XCHrj9hXSJ8/8t+CdMk5Qec/ZA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@whatwg-node/node-fetch": "^0.8.0",
+        "urlpattern-polyfill": "^10.0.0"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "node_modules/@whatwg-node/node-fetch": {
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/@whatwg-node/node-fetch/-/node-fetch-0.8.0.tgz",
+      "integrity": "sha512-+z00GpWxKV/q8eMETwbdi80TcOoVEVZ4xSRkxYOZpn3kbV3nej5iViNzXVke/j3v4y1YpO5zMS/CVDIASvJnZQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@fastify/busboy": "^3.1.1",
+        "@whatwg-node/disposablestack": "^0.0.6",
+        "@whatwg-node/promise-helpers": "^1.3.2",
+        "tslib": "^2.6.3"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "node_modules/@whatwg-node/promise-helpers": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@whatwg-node/promise-helpers/-/promise-helpers-1.3.2.tgz",
+      "integrity": "sha512-Nst5JdK47VIl9UcGwtv2Rcgyn5lWtZ0/mhRQ4G8NN2isxpq2TO30iqHzmwoJycjWuyUfg3GFXqP/gFHXeV57IA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "^2.6.3"
+      },
+      "engines": {
+        "node": ">=16.0.0"
+      }
+    },
+    "node_modules/@whatwg-node/server": {
+      "version": "0.10.12",
+      "resolved": "https://registry.npmjs.org/@whatwg-node/server/-/server-0.10.12.tgz",
+      "integrity": "sha512-MQIvvQyPvKGna586MzXhgwnEbGtbm7QtOgJ/KPd/tC70M/jbhd1xHdIQQbh3okBw+MrDF/EvaC2vB5oRC7QdlQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@envelop/instrumentation": "^1.0.0",
+        "@whatwg-node/disposablestack": "^0.0.6",
+        "@whatwg-node/fetch": "^0.10.10",
+        "@whatwg-node/promise-helpers": "^1.3.2",
+        "tslib": "^2.6.3"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "node_modules/acorn": {
       "version": "8.15.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
@@ -2842,6 +3002,16 @@
         "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
       }
     },
+    "node_modules/agent-base": {
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
+      "integrity": "sha512-MnA+YT8fwfJPgBx3m60MNqakm30XOkyIoH1y6huTQvC0PwZG7ki8NacLBcrPbNoo8vEZy7Jpuk7+jMO+CUovTQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14"
+      }
+    },
     "node_modules/ajv": {
       "version": "6.12.6",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
@@ -3090,12 +3260,29 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha512-BSHWgDSAiKs50o2Re8ppvp3seVHXSRM44cdSsT9FfNEUUZLOGWVCsiWaRPWM1Znn+mqZ1OfVZ3z3DWEzSp7hRA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/ast-types-flow": {
       "version": "0.0.8",
       "resolved": "https://registry.npmjs.org/ast-types-flow/-/ast-types-flow-0.0.8.tgz",
       "integrity": "sha512-OH/2E5Fg20h2aPrbe+QL8JZQFko0YZaF+j4mnQ7BGhfavO7OpSLa8a0y9sBwomHdSbkhTS8TQNayBfnW5DwbvQ==",
       "dev": true
     },
+    "node_modules/async-mutex": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/async-mutex/-/async-mutex-0.5.0.tgz",
+      "integrity": "sha512-1A94B18jkJ3DYq284ohPxoXbfTA5HsQ7/Mf4DEhcyLx3Bz27Rh59iScbB6EPiP+B+joue6YCxcMXSbFC1tZKwA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -3146,6 +3333,21 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/b4a": {
+      "version": "1.7.3",
+      "resolved": "https://registry.npmjs.org/b4a/-/b4a-1.7.3.tgz",
+      "integrity": "sha512-5Q2mfq2WfGuFp3uS//0s6baOJLMoVduPYVeNmDYxu5OUA1/cBfvr2RIS7vi62LdNj/urk1hfmj867I3qt6uZ7Q==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "react-native-b4a": "*"
+      },
+      "peerDependenciesMeta": {
+        "react-native-b4a": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/babel-jest": {
       "version": "30.1.2",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-30.1.2.tgz",
@@ -3250,6 +3452,13 @@
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
+    "node_modules/bare-events": {
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/bare-events/-/bare-events-2.7.0.tgz",
+      "integrity": "sha512-b3N5eTW1g7vXkw+0CXh/HazGTcO5KYuu/RCNaJbDMPI6LHDi+7qe8EmxKUVe1sUbY2KZOVZFyj62x0OEz9qyAA==",
+      "dev": true,
+      "license": "Apache-2.0"
+    },
     "node_modules/base64-arraybuffer": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-1.0.2.tgz",
@@ -3365,6 +3574,16 @@
         "node": ">=16.20.1"
       }
     },
+    "node_modules/buffer-crc32": {
+      "version": "0.2.13",
+      "resolved": "https://registry.npmjs.org/buffer-crc32/-/buffer-crc32-0.2.13.tgz",
+      "integrity": "sha512-VO9Ht/+p3SN7SKWqcrgEzjGbRSJYTx+Q1pTQC0wrWqHx0vpJraQ6GtHx8tvcg1rlK1byhU5gccxgOgj7B0TDkQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/buffer-equal-constant-time": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
@@ -3722,6 +3941,23 @@
         "node": ">= 6"
       }
     },
+    "node_modules/commondir": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
+      "integrity": "sha512-W9pAhw0ja1Edb5GVdIF1mjZw/ASI0AlShXM83UUGe2DVr5TdAPEA1OA8m/g8zWp9x6On7gqufY+FatDbC3MDQg==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/component-emitter": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.1.tgz",
+      "integrity": "sha512-T0+barUSQRTUQASh8bx02dl+DhF54GtIDY13Y3m9oWTklKbb3Wv974meRpeZ3lp1JpLVECWWNHC4vaG2XHXouQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -3735,6 +3971,35 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cookie": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.0.2.tgz",
+      "integrity": "sha512-9Kr/j4O16ISv8zBBhJoi4bXOYNTkFLOqSL3UDB0njXxCXNezjeyVrJyGOWtgfs/q2km1gwBcfH8q1yEGoMYunA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/cookiejar": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.4.tgz",
+      "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/core-js": {
+      "version": "3.45.1",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.45.1.tgz",
+      "integrity": "sha512-L4NPsJlCfZsPeXukyzHFlg/i7IIVwHSItR0wg0FLNqYClJ4MQYTYLbC7EkjKYRLZF2iof2MUgN0EGy7MdQFChg==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/core-js"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -3834,9 +4099,10 @@
       }
     },
     "node_modules/debug": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.0.tgz",
-      "integrity": "sha512-6WTZ/IxCY/T6BALoZHaE4ctp9xm+Z5kY/pzYaCHRFeyVhojxlrm+46y68HA6hr0TcwEssoxNiDEUJQjfPZ/RYA==",
+      "version": "4.4.3",
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+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
+      },
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
+    "node_modules/text-decoder": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/text-decoder/-/text-decoder-1.2.3.tgz",
+      "integrity": "sha512-3/o9z3X0X0fTupwsYvR03pJ/DjWuqqrfwBgTQzdWDiQSm9KitAyz/9WqsT2JQW7KV2m+bC2ol/zqpW37NHxLaA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "b4a": "^1.6.4"
+      }
+    },
     "node_modules/text-segmentation": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/text-segmentation/-/text-segmentation-1.0.3.tgz",
@@ -9049,9 +9683,9 @@
       "dev": true
     },
     "node_modules/ts-jest": {
-      "version": "29.4.1",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.4.1.tgz",
-      "integrity": "sha512-SaeUtjfpg9Uqu8IbeDKtdaS0g8lS6FT6OzM3ezrDfErPJPHNDo/Ey+VFGP1bQIDfagYDLyRpd7O15XpG1Es2Uw==",
+      "version": "29.4.4",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.4.4.tgz",
+      "integrity": "sha512-ccVcRABct5ZELCT5U0+DZwkXMCcOCLi2doHRrKy1nK/s7J7bch6TzJMsrY09WxgUUIP/ITfmcDS8D2yl63rnXw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -9379,6 +10013,13 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/urlpattern-polyfill": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/urlpattern-polyfill/-/urlpattern-polyfill-10.1.0.tgz",
+      "integrity": "sha512-IGjKp/o0NL3Bso1PymYURCJxMPNAf/ILOpendP9f5B6e1rTJgdgiOvgfoT8VxCAdY+Wisb9uhGaJJf3yZ2V9nw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -9788,6 +10429,20 @@
         "node": ">=8"
       }
     },
+    "node_modules/yauzl": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-3.2.0.tgz",
+      "integrity": "sha512-Ow9nuGZE+qp1u4JIPvg+uCiUr7xGQWdff7JQSk5VGYTAZMDe2q8lxJ10ygv10qmSj031Ty/6FNJpLO4o1Sgc+w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "buffer-crc32": "~0.2.3",
+        "pend": "~1.2.0"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/package.json b/package.json
index 6313a94..dfe2984 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,8 @@
     "dev": "next dev --turbopack",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint"
+    "lint": "next lint",
+    "test": "jest"
   },
   "dependencies": {
     "axios": "^1.7.9",
@@ -34,13 +35,17 @@
     "@types/nodemailer": "^6.4.17",
     "@types/react": "^19",
     "@types/react-dom": "^19",
+    "@types/supertest": "^6.0.3",
     "eslint": "^9",
     "eslint-config-next": "15.1.2",
     "jest": "^30.1.3",
     "jest-junit": "^16.0.0",
+    "mongodb-memory-server": "^10.2.1",
+    "next-test-api-route-handler": "^5.0.3",
     "postcss": "^8",
+    "supertest": "^7.1.4",
     "tailwindcss": "^3.4.1",
-    "ts-jest": "^29.4.1",
+    "ts-jest": "^29.4.4",
     "typescript": "^5"
   }
 }
diff --git a/server/mongodb/models/accountSchema.ts b/server/mongodb/models/accountSchema.ts
index ec8cef5..b9f9f4e 100644
--- a/server/mongodb/models/accountSchema.ts
+++ b/server/mongodb/models/accountSchema.ts
@@ -2,6 +2,7 @@ import mongoose, { Schema, Document } from "mongoose"
 import { DeviceInterface } from "./deviceSchema"
 
 export interface AccountInterface extends Document {
+    _id: mongoose.Types.ObjectId;
     name : string;
     email : string;
     password : string;
diff --git a/server/mongodb/models/deviceSchema.ts b/server/mongodb/models/deviceSchema.ts
index 5039817..60ac0f2 100644
--- a/server/mongodb/models/deviceSchema.ts
+++ b/server/mongodb/models/deviceSchema.ts
@@ -1,6 +1,7 @@
 import mongoose, { Document, Schema } from "mongoose";
 
 export interface DeviceInterface extends Document {
+    _id: mongoose.Types.ObjectId;
     name: string;
     uuid: string;
     powered?: boolean;
@@ -26,7 +27,7 @@ const DeviceSchema: Schema = new Schema<DeviceInterface>({
     colorTimestamp: { type: Date },
     brightness: { type: Number },
     brightnessTimestamp: { type: Date },
-    user: { type: mongoose.Schema.Types.ObjectId, ref: "User", required: true },
+    user: { type: mongoose.Schema.Types.ObjectId, ref: "Account", required: true },
     lastUpdated: { type: Date, required: true, default: Date.now }
 });
 
diff --git a/tests/account/account.api.test.ts b/tests/account/account.api.test.ts
new file mode 100644
index 0000000..836d140
--- /dev/null
+++ b/tests/account/account.api.test.ts
@@ -0,0 +1,128 @@
+// ✅ Mock dbConfig BEFORE importing any route handlers
+jest.mock("@/dbConfig", () => ({
+  connect: async () => {},      // no-op to bypass real connect
+  disconnect: async () => {},   // no-op
+}));
+
+import User from "@/server/mongodb/models/accountSchema";
+import bcrypt from "bcryptjs";
+import { POST as deviceHandler } from "@/app/api/users/devices/route";
+import { POST as signupHandler } from "@/app/api/users/signup/route";
+import { POST as loginHandler } from "@/app/api/users/login/route";
+import { DELETE as deleteHandler } from "@/app/api/users/deleteAccount/route";
+import { GET as logoutHandler } from "@/app/api/users/logout/route";
+import { NextRequest } from "next/server";
+
+// Helper to create NextRequest
+function makeRequest(body: any, method = "POST") {
+  return new NextRequest("http://localhost/api/test", {
+    method,
+    body: JSON.stringify(body),
+  } as any);
+}
+
+describe("Account Service API Handlers (App Router)", () => {
+  it("should create a new user", async () => {
+    const req = makeRequest({
+      name: "Test User",
+      email: "test@example.com",
+      password: "Password123",
+    });
+
+    const res: any = await signupHandler(req);
+    const json = await res.json();
+
+    expect(res.status).toBe(200);
+    expect(json.success).toBe(true);
+    expect(json.savedUser.email).toBe("test@example.com");
+  });
+
+  it("should login a user", async () => {
+    const hashed = await bcrypt.hash("Password123", 10);
+    await User.create({
+      name: "Login User",
+      email: "login@test.com",
+      password: hashed,
+    });
+
+    const req = makeRequest({
+      email: "login@test.com",
+      password: "Password123",
+    });
+    const res: any = await loginHandler(req);
+    const json = await res.json();
+
+    expect(res.status).toBe(200);
+    expect(json.success).toBe(true);
+  });
+
+  it("should logout a user", async () => {
+    const req = makeRequest({}, "POST");
+    const res: any = await logoutHandler(req);
+    const json = await res.json();
+
+    expect(res.status).toBe(200);
+    expect(json.success).toBe(true);
+  });
+
+  it("should delete a user by ID", async () => {
+    const user = await User.create({
+      name: "Delete Me",
+      email: "delete@test.com",
+      password: "123",
+    });
+
+    const userId = user._id.toString();
+    const req = makeRequest({ userId }, "DELETE");
+
+    const res: any = await deleteHandler(req);
+    const json = await res.json();
+
+    expect(res.status).toBe(200);
+    expect(json.success).toBe(true);
+
+    const found = await User.findById(user._id);
+    expect(found).toBeNull();
+  });
+});
+
+// ✅ Mock getDataFromToken for device tests
+jest.mock("@/helper/getDataFromToken", () => ({
+  getDataFromToken: () => testUserId,
+}));
+
+let testUserId: string;
+
+describe("Device API (link device)", () => {
+  it("should create and link a device to an account", async () => {
+    const account = await User.create({
+      name: "Device Owner",
+      email: "owner@test.com",
+      password: "Password123",
+    });
+    testUserId = account._id.toString();
+
+    const req = new NextRequest("http://localhost/api/device", {
+      method: "POST",
+      body: JSON.stringify({
+        name: "Smart Lamp",
+        color: "Red",
+        brightness: 80,
+        powered: true,
+      }),
+    } as any);
+
+    const res: any = await deviceHandler(req);
+    const json = await res.json();
+
+    expect(res.status).toBe(201);
+    expect(json.message).toBe("Device registered successfully");
+    expect(json.device.name).toBe("Smart Lamp");
+
+    const updatedAccount = await User.findById(testUserId).populate(
+      "devicesLinked"
+    );
+    expect(updatedAccount!.devicesLinked.length).toBe(1);
+    expect((updatedAccount!.devicesLinked[0] as any).name).toBe("Smart Lamp");
+  });
+});
diff --git a/tests/account/account.test.ts b/tests/account/account.test.ts
new file mode 100644
index 0000000..d421efe
--- /dev/null
+++ b/tests/account/account.test.ts
@@ -0,0 +1,78 @@
+import User from "@/server/mongodb/models/accountSchema";
+import Device from "@/server/mongodb/models/deviceSchema";
+import bcrypt from "bcryptjs";
+
+describe("Account Service API (classic route tests)", () => {
+  it("should sign up a new user", async () => {
+    const userData = {
+      name: "Test User",
+      email: "signup@test.com",
+      password: "Password123",
+    };
+
+    const user = new User({
+      name: userData.name,
+      email: userData.email,
+      password: await bcrypt.hash(userData.password, 10),
+    });
+    await user.save();
+
+    const found = await User.findOne({ email: userData.email });
+    expect(found).not.toBeNull();
+    expect(found!.email).toBe(userData.email);
+  });
+
+  it("should log in a user", async () => {
+    const hashed = await bcrypt.hash("Password123", 10);
+    await User.create({
+      name: "Login User",
+      email: "login@test.com",
+      password: hashed,
+    });
+
+    const user = await User.findOne({ email: "login@test.com" });
+    expect(user).not.toBeNull();
+
+    const isMatch = await bcrypt.compare("Password123", user!.password);
+    expect(isMatch).toBe(true);
+  });
+
+  it("should log out a user", async () => {
+    const loggedOut = true; // simulate
+    expect(loggedOut).toBe(true);
+  });
+
+  it("should delete an account", async () => {
+    const user = await User.create({
+      name: "Delete Me",
+      email: "delete@test.com",
+      password: "123",
+    });
+
+    await User.findByIdAndDelete(user._id);
+    const found = await User.findById(user._id);
+    expect(found).toBeNull();
+  });
+
+  it("should link a device to an account", async () => {
+    const account = await User.create({
+      name: "Device Owner",
+      email: "owner@test.com",
+      password: "Password123",
+    });
+
+    const device = await Device.create({
+      name: "Smart Lamp",
+      uuid: "lamp-12345",
+      user: account._id,
+    });
+
+    account.devicesLinked.push(device._id);
+    await account.save();
+
+    const found = await User.findById(account._id).populate("devicesLinked");
+    expect(found).not.toBeNull();
+    expect(found!.devicesLinked.length).toBe(1);
+    expect((found!.devicesLinked[0] as any).uuid).toBe("lamp-12345");
+  });
+});
diff --git a/tests/setup.ts b/tests/setup.ts
new file mode 100644
index 0000000..6e6dded
--- /dev/null
+++ b/tests/setup.ts
@@ -0,0 +1,33 @@
+// tests/setup.ts
+import { MongoMemoryServer } from "mongodb-memory-server";
+import mongoose from "mongoose";
+
+let mongo: MongoMemoryServer;
+
+beforeAll(async () => {
+  // Start in-memory MongoDB
+  mongo = await MongoMemoryServer.create();
+
+  // Set test DB URL
+  process.env.MONGO_DB_URL = mongo.getUri();
+
+  // Connect mongoose directly
+  await mongoose.connect(process.env.MONGO_DB_URL);
+  console.log("✅ Connected to in-memory MongoDB");
+});
+
+afterAll(async () => {
+  // Disconnect mongoose and stop Mongo
+  await mongoose.disconnect();
+  if (mongo) await mongo.stop();
+  console.log("🛑 Disconnected from in-memory MongoDB");
+});
+
+afterEach(async () => {
+  // Clear all collections
+  if (!mongoose.connection.db) return;
+  const collections = await mongoose.connection.db.collections();
+  for (let collection of collections) {
+    await collection.deleteMany({});
+  }
+});