diff --git a/app.py b/app.py
deleted file mode 100644
index a2968bf..0000000
--- a/app.py
+++ /dev/null
@@ -1,29 +0,0 @@
-import os
-import sys
-from flask import Flask
-from config import Config, DevelopmentConfig, StagingConfig, ProductionConfig
-from flask_sqlalchemy import SQLAlchemy
-
-if __name__ == '__main__':
-    app = Flask(__name__)
-
-    PORT = int(os.environ.get('PORT', 33507))
-    db1 = SQLAlchemy(app)
-    db2 = SQLAlchemy(app)
-
-    FLASK_ENV = os.environ.get('FLASK_ENV', None)
-    if FLASK_ENV == 'production':
-        DEBUG = ProductionConfig.DEBUG
-    elif FLASK_ENV == 'stage':
-        DEBUG = StagingConfig.DEBUG
-    elif FLASK_ENV == 'development':
-        DEBUG = DevelopmentConfig.DEBUG
-    else:
-        sys.exit("Error FLASK_ENV")
-
-    if Config.SQLALCHEMY_DATABASE_URI_1 is None or Config.SQLALCHEMY_DATABASE_URI_2 is None:
-        sys.exit("Error SQLALCHEMY_DATABASE_URI_1 or/and SQLALCHEMY_DATABASE_URI_2")
-
-    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = Config.SQLALCHEMY_TRACK_MODIFICATIONS
-    app.config['SECRET_KEY'] = Config.SECRET_KEY
-    app.run(host='0.0.0.0', port=PORT, debug=DEBUG)
\ No newline at end of file
diff --git a/backend/app.py b/backend/app.py
new file mode 100644
index 0000000..7a0c77b
--- /dev/null
+++ b/backend/app.py
@@ -0,0 +1,6 @@
+from application import create_app
+
+app = create_app()
+
+if __name__ == "__main__":
+    app.run(host='0.0.0.0')
diff --git a/backend/application/__init__.py b/backend/application/__init__.py
new file mode 100644
index 0000000..1734aec
--- /dev/null
+++ b/backend/application/__init__.py
@@ -0,0 +1,31 @@
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from ddtrace import patch_all
+import sys
+import os
+
+db = SQLAlchemy()
+patch_all()
+
+
+def create_app():
+    app = Flask(__name__)
+    FLASK_ENV = os.environ.get('FLASK_ENV', None)
+    if FLASK_ENV == 'production':
+        app.config.from_object("config.ProductionConfig")
+    elif FLASK_ENV == 'staging':
+        app.config.from_object("config.StagingConfig")
+    elif FLASK_ENV == 'development':
+        app.config.from_object("config.DevelopmentConfig")
+    else:
+        app.config.from_object("config.Config")
+
+    if app.config['SQLALCHEMY_DATABASE_URI_1'] is None or app.config['SQLALCHEMY_DATABASE_URI_2'] is None:
+        print('No ENV Variable for DATABASE_URL_1 or DATABASE_URL_2')
+        sys.exit(1)
+
+    db.init_app(app)
+    with app.app_context():
+        from . import routes
+        db.create_all()
+        return app
diff --git a/models/logs.model.py b/backend/application/logs_model.py
similarity index 59%
rename from models/logs.model.py
rename to backend/application/logs_model.py
index 3cada69..78b42a2 100644
--- a/models/logs.model.py
+++ b/backend/application/logs_model.py
@@ -1,16 +1,16 @@
-from app import db2
+from . import db
 
 
-class Logs(db2.Model):
-    __tablename__ = 'logs'
+class Logs(db.Model):
+    __bind_key__ = 'logs'
 
-    id = db2.Column(db2.Integer, primary_key=True)
-    date = db2.Column(db2.Date())
-    user = db2.Column(db2.String())
-    ip = db2.Column(db2.String())
-    table = db2.Column(db2.String())
-    action = db2.Column(db2.String())
-    status = db2.Column(db2.String())
+    id = db.Column(db.Integer, primary_key=True)
+    date = db.Column(db.Date())
+    user = db.Column(db.String())
+    ip = db.Column(db.String())
+    table = db.Column(db.String())
+    action = db.Column(db.String())
+    status = db.Column(db.String())
 
     def __init__(self, date, user, ip, table, action, status):
         self.date = date
diff --git a/responses.py b/backend/application/responses.py
similarity index 95%
rename from responses.py
rename to backend/application/responses.py
index 4015a3c..df1c610 100644
--- a/responses.py
+++ b/backend/application/responses.py
@@ -1,4 +1,4 @@
-from app import app
+from flask import current_app as app
 import json
 
 
diff --git a/routes.py b/backend/application/routes.py
similarity index 61%
rename from routes.py
rename to backend/application/routes.py
index d0f7d10..8e582d9 100644
--- a/routes.py
+++ b/backend/application/routes.py
@@ -1,5 +1,8 @@
-from app import app
-from responses import send_message, send_error
+from flask import current_app as app
+from flask import request
+from .logs_model import Logs, db
+from .users_model import Users, db
+from .responses import send_message, send_error
 
 
 # Login
@@ -11,7 +14,29 @@ def login():
 # Register
 @app.route('/api/register', methods=['POST'])
 def register():
-    return send_message('Register not implemented', None)
+    post_email = str(request.form['email'])
+    post_login = str(request.form['login'])
+    post_hashPass = str(request.form['hashPass'])
+    post_role = str(request.form['role'])
+
+    if post_email and post_login and post_hashPass and post_role:
+        user = Users.query.filter(
+            Users.email == post_email or Users.login == post_login
+        ).first()
+        if user:
+            return send_message(f"{post_email} ({post_login}) already exist.", None)
+        user = Users(
+            email=post_email,
+            login=post_login,
+            hashPass=post_hashPass,
+            role=post_role
+        )
+        db.session.add(user)
+        db.session.commit()
+        return send_message('User registered.', user)
+
+    else:
+        return send_error(400, 'POST Request Error : Need email, login, hashPass and role fields.')
 
 
 # Logout
diff --git a/models/users.model.py b/backend/application/users_model.py
similarity index 58%
rename from models/users.model.py
rename to backend/application/users_model.py
index 2323f6c..c378181 100644
--- a/models/users.model.py
+++ b/backend/application/users_model.py
@@ -1,14 +1,14 @@
-from app import db1
+from . import db
 
 
-class Users(db1.Model):
-    __tablename__ = 'users'
+class Users(db.Model):
+    __bind_key__ = 'users'
 
-    id = db1.Column(db1.Integer, primary_key=True)
-    email = db1.Column(db1.String())
-    login = db1.Column(db1.String())
-    hashPass = db1.Column(db1.String())
-    role = db1.Column(db1.String())
+    id = db.Column(db.Integer, primary_key=True)
+    email = db.Column(db.String())
+    login = db.Column(db.String())
+    hashPass = db.Column(db.String())
+    role = db.Column(db.String())
 
     def __init__(self, email, login, hash_pass, role):
         self.email = email
diff --git a/config.py b/backend/config.py
similarity index 59%
rename from config.py
rename to backend/config.py
index bc0b0c2..a924e0a 100644
--- a/config.py
+++ b/backend/config.py
@@ -1,14 +1,26 @@
 import os
 
+basedir = os.path.abspath(os.path.dirname(__file__))
+
 
 class Config(object):
     DEBUG = False
     TESTING = False
     CSRF_ENABLED = True
+
+    PORT = int(os.environ.get('PORT', 33507))
     SECRET_KEY = os.environ.get('SECRET_KEY', None)
+    FLASK_APP = os.environ.get('FLASK_APP', None)
+    FLASK_ENV = os.environ.get('FLASK_ENV', None)
+
+    SQLALCHEMY_ECHO = False
     SQLALCHEMY_TRACK_MODIFICATIONS = False
     SQLALCHEMY_DATABASE_URI_1 = os.environ.get('DATABASE_URL_1', None)
     SQLALCHEMY_DATABASE_URI_2 = os.environ.get('DATABASE_URL_2', None)
+    SQLALCHEMY_BINDS = {
+        'users': SQLALCHEMY_DATABASE_URI_1,
+        'logs': SQLALCHEMY_DATABASE_URI_2
+    }
 
 
 class ProductionConfig(Config):
diff --git a/backend/manage.py b/backend/manage.py
new file mode 100644
index 0000000..5d1985b
--- /dev/null
+++ b/backend/manage.py
@@ -0,0 +1,14 @@
+from flask_script import Manager
+from flask_migrate import Migrate, MigrateCommand
+
+from flask import current_app as app
+from . import db
+
+migrate = Migrate(app, db)
+manager = Manager(app)
+
+manager.add_command('db', MigrateCommand)
+
+
+if __name__ == '__main__':
+    manager.run()
\ No newline at end of file
diff --git a/backend/requirements.txt b/backend/requirements.txt
new file mode 100644
index 0000000..6a74357
--- /dev/null
+++ b/backend/requirements.txt
@@ -0,0 +1,5 @@
+Flask_Migrate==3.1.0
+ddtrace==0.56.1
+Flask_SQLAlchemy==2.5.1
+Flask_Script==2.0.6
+Flask==2.0.2