diff --git a/Pipfile b/Pipfile
index 19f4e5a..91f86e2 100644
--- a/Pipfile
+++ b/Pipfile
@@ -21,3 +21,5 @@ flask-script = "*"
 flask-migrate = "*"
 faker = "*"
 flask-restplus-patched = "*"
+flask-marshmallow = "*"
+marshmallow-sqlalchemy = "*"
diff --git a/app.py b/app.py
index 52b228d..277e5e3 100644
--- a/app.py
+++ b/app.py
@@ -7,11 +7,13 @@ from flask import Flask, jsonify, request
 from flask_restplus import Resource, Api
 from dotenv import load_dotenv, find_dotenv
 from models import db, User, News, Comment
+from flask_marshmallow import Marshmallow
 
 # Extensions initialization
 # =========================
 load_dotenv(find_dotenv())
 app = Flask(__name__)
+ma = Marshmallow(app)
 api = Api(app)
 
 
@@ -24,27 +26,60 @@ db.init_app(app)
 PRE_URL = '/api/v1/'
 
 
+# Schemas
+# =========================
+
+# User
+class UserSchema(ma.Schema):
+    class Meta:
+        # Fields to expose
+        fields = ('username', 'mail')
+
+
+user_schema = UserSchema()
+users_schema = UserSchema(many=True)
+
+# Routes
+# =========================
+
+# Signup
 @api.route(PRE_URL + 'signup')
 class Signup(Resource):
 
     def post(self):
         return {'hello': 'world'}
 
-
+# Login
 @api.route(PRE_URL + 'login')
 class Login(Resource):
 
     def post(self):
         return {'hello': 'world'}
 
-
+# Logout
 @api.route(PRE_URL + 'login')
 class Logout(Resource):
 
     def get(self):
         return {'hello': 'world'}
 
+# User
+@api.route(PRE_URL + 'user')
+class UserList(Resource):
 
+    def get(self):
+        all_users = User.query.all()
+        return users_schema.jsonify(all_users)
+
+
+@api.route(PRE_URL + 'user/<int:id>')
+class UserSingle(Resource):
+
+    def get(self, id):
+        all_users = User.query.get(id)
+        return user_schema.jsonify(all_users)
+
+# News
 @api.route(PRE_URL + 'news')
 class NewsList(Resource):
 
@@ -63,6 +98,7 @@ class News_single(Resource):
         return {'hello': id}
 
 
+# Comment
 @api.route(PRE_URL + 'news/<int:id>/comments')
 class Comments(Resource):
 
@@ -73,10 +109,8 @@ class Comments(Resource):
         return {'hello': 'world'}
 
 
-def serializeQuery(query):
-    return jsonify([i.serialize for i in query])
-
-
+# Run
+# =========================
 if __name__ == '__main__':
-    app.run(debug=os.environ.get('DEBUG') == 'True' if True else False)
+    app.run(debug=True if os.environ.get('DEBUG') == 'True' else False)
 
diff --git a/models.py b/models.py
index 5ad80b0..7e516c2 100644
--- a/models.py
+++ b/models.py
@@ -45,7 +45,9 @@ class News(db.Model):
     '''
     Table News
     '''
+
     __tablename__ = 'news'
+
     id = db.Column(db.Integer, primary_key=True)
     title = db.Column(db.String(100))
     link = db.Column(db.String(500))
@@ -58,16 +60,6 @@ class News(db.Model):
     user = db.relationship(
         'User', backref=db.backref('News', lazy=True))
 
-    @property
-    def serialize(self):
-        """Return object data in easily serializeable format"""
-        return {
-           'id': self.id,
-           'title': self.title,
-           'link': self.link,
-           'user_id': self.user_id
-        }
-
     def __repr__(self):
         return '<News Table {0}>'.format(self.title)
 
@@ -76,7 +68,9 @@ class Comment(db.Model):
     '''
     Table Comment
     '''
+
     __tablename__ = 'comments'
+
     id = db.Column(db.Integer, primary_key=True)
     text = db.Column(db.String(1000))
     news_id = db.Column(