better user handling

setup.sh

@@ -206,7 +206,7 @@ from apscheduler.schedulers.background import BackgroundScheduler
 from apscheduler.jobstores.sqlalchemy import SQLAlchemyJobStore
 import atexit
 from flask_migrate import Migrate
-from sqlalchemy import MetaData, event
+from sqlalchemy import MetaData, event, UniqueConstraint
 from reportlab.pdfgen import canvas
 from reportlab.lib.pagesizes import A4, landscape, letter
 from reportlab.platypus import (
@@ -378,6 +378,9 @@ class User(UserMixin, db.Model):
 
 class Game(db.Model):
     __tablename__ = 'games'
+    __table_args__ = (
+        UniqueConstraint('steam_key', 'user_id', name='uq_steam_key_user'),
+    )
     
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column(db.String(100), nullable=False)
@@ -392,11 +395,7 @@ class Game(db.Model):
     platform = db.Column(db.String(50), default='pc')
     
     # with users.id
-    user_id = db.Column(
-        db.Integer, 
-        db.ForeignKey('users.id', ondelete='CASCADE'),  # Wichtig
-        nullable=False
-    )
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'), nullable=False)
     
     owner = db.relationship(
         'User',