Fix infinite sql query bug

tests/test_highscores.py

@@ -208,7 +208,11 @@ async def test_get_highscores_returns_sorted_list_with_correct_length():
             response = client.post(
                 "/register",
                 headers=headers,
-                json={"username": user, "password": password, "avatar": avatar},
+                json={
+                    "username": user,
+                    "password": password,
+                    "avatar_index": avatar_index,
+                },
             )
 
             assert response.status_code == 200