Fix restart/start if not account with the first account of the user

src/Managing.Application/Bots/Grains/LiveTradingBotGrain.cs

@@ -1006,4 +1006,17 @@ public class LiveTradingBotGrain : Grain, ILiveTradingBotGrain, IRemindable
             return true;
         }
     }
+
+    /// <summary>
+    /// Gets the user who owns this bot
+    /// </summary>
+    public Task<User> GetUserAsync()
+    {
+        if (_state.State.User == null)
+        {
+            throw new InvalidOperationException($"Bot '{_state.State.Config?.Name}' (ID: {_state.State.Identifier}) has no user information.");
+        }
+
+        return Task.FromResult(_state.State.User);
+    }
 }