fix

backend/routers/users.py

@@ -84,3 +84,17 @@ async def assign_app_to_user(user_id: int, app_id: int, db: Session = Depends(da
     db.add(new_assignment)
     db.commit()
     return {"message": "Assigned successfully"}
+
+@router.delete("/{user_id}/assign/{app_id}")
+async def remove_app_assignment(user_id: int, app_id: int, db: Session = Depends(database.get_db)):
+    assignment = db.query(models.UserApplication).filter(
+        models.UserApplication.user_id == user_id,
+        models.UserApplication.application_id == app_id
+    ).first()
+    
+    if not assignment:
+        raise HTTPException(status_code=404, detail="Assignment not found")
+        
+    db.delete(assignment)
+    db.commit()
+    return {"message": "Assignment removed"}