diff --git a/Shogi.Api/Application/ShogiApplication.cs b/Shogi.Api/Application/ShogiApplication.cs
index 926f18c..0851b50 100644
--- a/Shogi.Api/Application/ShogiApplication.cs
+++ b/Shogi.Api/Application/ShogiApplication.cs
@@ -95,7 +95,7 @@ public class ShogiApplication(
 			}
 			else
 			{
-				var isPromotion = command.IsPromotion.HasValue ? command.IsPromotion.Value : false;
+				var isPromotion = command.IsPromotion ?? false;
 				session.Board.Move(command.From!, command.To, isPromotion);
 			}
 		}
@@ -109,7 +109,6 @@ public class ShogiApplication(
 		await gameHubContext.Emit_PieceMoved(sessionId);
 
 		return new NoContentResult();
-
 	}
 
 	public async Task<IActionResult> JoinSession(string sessionId, string player2Id)
@@ -120,12 +119,9 @@ public class ShogiApplication(
 		if (string.IsNullOrEmpty(session.Player2))
 		{
 			session.AddPlayer2(player2Id);
-
 			await sessionRepository.SetPlayer2(sessionId, player2Id);
 
-			var player2Email = this.GetUsername(player2Id);
 			await gameHubContext.Emit_SessionJoined(sessionId);
-
 			return new OkResult();
 		}