diff --git a/Retos/sesion3-reto1/Sesion3-reto1.js b/Retos/sesion3-reto1/Sesion3-reto1.js
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+//Clase de usuario de spotify
+class User{
+    constructor(id,name, lastName, email, password,profileImage, subscription,playlists){
+
+
+        if(!playlists){
+            playlists=[];
+        }
+
+        this.id=id;
+        this.name=name;
+        this.lastName=lastName;
+        this.email=email;
+        this.password=password;
+        this.profileImage=profileImage;
+        this.subscription=new Subscription(subscription.type,subscription.activationDate,subscription.expirationDate);
+        this.playlists=playlists;
+
+    }
+    getName(){
+        return this.name;
+    }
+}
+
+//Clase de Artista
+class Artist{
+    constructor(idArtist,name,country,albums){
+        if(!albums){
+            albums=[];
+            
+        }
+
+
+        this.idArtist=idArtist;
+        this.name=name;
+        this.country = country;
+        this.albums=albums;
+
+    }
+}
+
+
+class Album{
+
+    constructor(id,name, releaseDate, genre,songs){
+        this.id=id;
+        this.name=name;
+        this.releaseDate=releaseDate;
+        this.genre=genre;
+        this.songs=songs;
+       
+    }
+
+  
+}
+
+
+
+class Song{
+    constructor(id,name, urlMedia,tags){
+        this.id=id;
+        this.name=name;
+        this.urlMedia=urlMedia;
+        this.tags=tags;
+    }
+}
+
+
+class PlayList{
+
+    constructor(id,name,songs){
+        this.id=id;
+        this.name=name;
+        this.songs=songs;
+    }
+}
+
+
+
+
+
+//Clase de subscripción que puede tener un usuario
+class Subscription{
+    constructor(type,activationDate,expirationDate){
+        this.type=type;
+        this.activationDate=activationDate;
+        this.expirationDate=expirationDate;
+    }
+}
+
+
+
+let SpotifyDB;
+let Users=[];
+let Songs=[];
+let Artists=[];
+
+class db{
+    constructor(users,artists){
+
+        if(!artists){
+            this.artists=artists;
+        }else if(!users){
+            this.users=users;
+        }else{
+            this.users=users;
+            this.artists=artists;
+        }
+
+
+        
+       
+    }
+}
+
+function Spotify(){
+    return{
+        init:function(){
+            SpotifyDB = new db([],[]);
+        },
+        addUser: function(id,name,lastName,email,password,profileImage, subscription,playlists){
+            Users.push(new User(id,name,lastName,email, password,profileImage, new Subscription(subscription.type, subscription.activationDate,subscription.expirationDate),playlists))
+        },
+        addSong: function(id,name, urlMedia, tags){
+           Songs.push(new Song(id,name,urlMedia,tags));
+            
+        },
+        addArtist:function(id,name,country,albums){
+            Artists.push(new Artist(id,name,country,albums));
+
+        },
+        addAlbum:function(idArtist,id,name, releaseDate, genre,songs){
+            let index = Artists.findIndex(x => x.idArtist === idArtist);
+            Artists[index].albums.push(new Album(id,name,releaseDate,genre,songs))
+        },
+        addSongToAlbum:function(idArtist,idAlbum,idSongs){
+            let indexArtist = Artists.findIndex(x => x.idArtist === idArtist);
+            let indexAlbum = Artists[indexArtist].albums.findIndex(x => x.id === idAlbum);
+
+            let tempSong = Songs[Songs.findIndex(x => x.id === idSongs)];
+            
+            Artists[indexArtist].albums[indexAlbum].songs.push(new Song(tempSong.id,tempSong.name,tempSong.urlMedia,tempSong.tags));
+
+
+        },
+        addPlayList:function(idUser,idPlayList,name,songs){
+            let indexUser = Users.findIndex(x=>x.id === idUser);
+           
+            Users[indexUser].playlists.push(new PlayList(idPlayList,name,songs));
+
+
+        },
+
+        updateDB: function(users,artists){
+
+            for(let i=0; i<users.length;i++){
+                let tempUser=users[i];
+                SpotifyDB.users.push(tempUser);
+            }
+
+            for(let i=0; i<artists.length;i++){
+                let tempArtist=artists[i];
+                SpotifyDB.artists.push(tempArtist);
+            }
+            
+        }
+    }
+}
+
+let spotifyInstance = Spotify();
+spotifyInstance.init();
+
+
+
+//Artistas
+spotifyInstance.addArtist(1,"Yola","Perú",[]);
+spotifyInstance.addArtist(2,"Bad Bunny", "Puerto Rico",[]);
+
+
+//Crear albumes relacionados con los artistas
+spotifyInstance.addAlbum(1,1,"Infantiles 2018","01/06/19",["Infantil"],[]);
+spotifyInstance.addAlbum(2,1,"x100 pre","01/06/19",["Trap", "Reggaeton"],[]);
+spotifyInstance.addAlbum(2,2,"Second Album","01/06/19",["Trap"],[]);
+
+
+
+
+
+//Canciones que se registran en spotify
+spotifyInstance.addSong(1,"La cucaracha", "https://www.youtube.com/watch?v=HeoBvMNf3FQ", ["infantil", "alegre"]);
+spotifyInstance.addSong(2,"El trensito","https://www.youtube.com/watch?v=ScnR-wOhj8U", ["infantil", "alegre"]);
+
+spotifyInstance.addSong(3,"Mia","https://www.youtube.com/watch?v=OSUxrSe5GbI", ["chill", "alegre"]);
+
+spotifyInstance.addSong(4,"Te bote","https://www.youtube.com/watch?v=9jI-z9QN6g8", ["chill", "reggaeton"]);
+
+
+//console.log(Songs);
+//Asocio las canciones a los artistas/albunes
+
+//canciones de Yola agregadas album
+spotifyInstance.addSongToAlbum(1,1,1);//Se añade la cancion cucaracha/Intantiles/yola
+spotifyInstance.addSongToAlbum(1,1,2);
+
+
+
+//canciones de Bad Bunny agregadas al album
+spotifyInstance.addSongToAlbum(2,1,3);
+spotifyInstance.addSongToAlbum(2,2,4);
+
+// Un usuario se registra en spotify
+spotifyInstance.addUser(1,"Hugo","Deudor", "hufedebe@gmail.com", "hackspace","https://static.thenounproject.com/png/363633-200.png", new Subscription("free","01/06/19","02/06/19"),[]);
+
+
+
+//Creamos un playlist para el usuario HUgo
+spotifyInstance.addPlayList(1,1,"Musica para estudiar",[]);
+spotifyInstance.addPlayList(1,2,"Musica para tonear",[]);
+
+
+
+
+spotifyInstance.updateDB(Users,Artists);
+
+
+
+
+let readData = JSON.stringify(SpotifyDB);
+console.log(SpotifyDB);
+console.log(readData);
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