Fixed login with group functions

lapp.py

@@ -7,6 +7,7 @@ from admin import admin_bp
 from lists import lists_bp
 from items import items_bp
 from api import api_bp
+from groups import groups_bp
 
 login_manager = LoginManager()
 
@@ -24,6 +25,7 @@ def create_app():
     app.register_blueprint(lists_bp)
     app.register_blueprint(items_bp)
     app.register_blueprint(api_bp)
+    app.register_blueprint(groups_bp)
 
     with app.app_context():
         db.create_all()