fix: get_mentionでusernameではなくnicknameを使っていた

mipac/actions/user.py

@@ -5,9 +5,8 @@ from typing import TYPE_CHECKING, Optional
 from mipac.exception import NotExistRequiredData, ParameterError
 from mipac.http import HTTPClient, Route
 from mipac.manager.note import NoteManager
-from mipac.util import cache, check_multi_arg, remove_dict_empty
 from mipac.models.user import UserDetailed
-
+from mipac.util import cache, check_multi_arg, remove_dict_empty
 
 if TYPE_CHECKING:
     from mipac.manager.client import ClientActions
@@ -162,5 +161,7 @@ class UserActions:
         if user is None:
             raise NotExistRequiredData('Required parameters: user')
         return (
-            f'@{user.name}@{user.host}' if user.instance else f'@{user.name}'
+            f'@{user.username}@{user.host}'
+            if user.instance
+            else f'@{user.username}'
         )