Update play_helper.py, make options visible but not interactive.

play_helper.py

@@ -78,8 +78,8 @@ def declare_components(demo, greet, use_login_button=False):
         check_played_game, [user_state, solved_games, solved_games_df], [solved_games, solved_games_df]
     ).then(
         lambda uid: ([gr.update(visible=True, interactive=True)] if uid else
-                     [gr.update(visible=False, interactive=False)]) * 3,
-        [uid_state], [level_radio, game_radio, new_game_btn]
+                     [gr.update(visible=True, interactive=False)]) * 4,
+        [uid_state], [level_radio, game_radio, new_game_btn, logout_btn]
     )
 
     return (
@@ -724,6 +724,8 @@ def start_new_game(game_name, level, session_state_component, is_solved_componen
 
 # %%
 def check_to_start_new_game(game_name, level, user=None, uid=None, sid=None):
+    if not uid:
+        raise gr.Error("please login first!")
     if not sid and isinstance(user, dict):
         sid = user.get('sid', None)
     print(f"  >>> Starts @ {datetime.now()}:", uid, sid, game_name, level, sep="  ")