Login credentials now optional

Author: jenow

package.json

@@ -1,6 +1,6 @@
 {
   "name": "kuzzle-sdk",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "description": "Official Javascript SDK for Kuzzle",
   "author": "The Kuzzle Team <[email protected]>",
   "repository": {

src/kuzzle.js

@@ -434,6 +434,11 @@ Kuzzle.prototype.login = function (strategy, credentials, expiresIn, cb) {
       strategy: strategy
     };
 
+  // don't need credentials in case of an OAUTH strategy
+  if (typeof credentials === 'number' || typeof credentials === 'string') {
+    cb = expiresIn;
+    expiresIn = credentials;
+  }
   if (!cb && typeof expiresIn === 'function') {
     cb = expiresIn;
     expiresIn = null;