diff --git a/matrix_appservice_kakaotalk/commands/conn.py b/matrix_appservice_kakaotalk/commands/conn.py
index 8af0b99..6d351bd 100644
--- a/matrix_appservice_kakaotalk/commands/conn.py
+++ b/matrix_appservice_kakaotalk/commands/conn.py
@@ -65,6 +65,7 @@ async def whoami(evt: CommandEvent) -> None:
         own_info = None
     except CommandException as e:
         await evt.reply(f"Error from KakaoTalk: {e}")
+        return
     if own_info:
         await evt.reply(
             f"You're logged in as `{own_info.more.uuid}` (nickname: {own_info.more.nickName}, user ID: {evt.sender.ktid})."