Adds own/disown game logic

backend-actix/src/main.rs

@@ -52,6 +52,9 @@ async fn main() -> std::io::Result<()> {
             .service(get_game)
             .service(post_game)
             .service(post_rename_game)
+            .service(post_own_game)
+            .service(post_disown_game)
+            .service(get_owned_games)
     })
     .bind(("::1", 8080))?
     .run()