refactor: user nick_name

Author: wxg0103

apps/locales/en_US/LC_MESSAGES/django.po

@@ -3491,7 +3491,7 @@ msgid "Phone"
 msgstr ""
 
 #: users/serializers/user.py:95
-msgid "Username must be 6-20 characters long"
+msgid "Username must be 4-20 characters long"
 msgstr ""
 
 #: users/serializers/user.py:108 users/serializers/user.py:244
@@ -3676,7 +3676,7 @@ msgstr ""
 msgid "System API Key"
 msgstr ""
 
-msgid "msgid "Create SystemAPIKey"
+msgid "Create SystemAPIKey"
 msgstr ""
 
 msgid "Get SystemAPIKey List"

apps/locales/zh_CN/LC_MESSAGES/django.po

@@ -3618,8 +3618,8 @@ msgid "Phone"
 msgstr "手机"
 
 #: users/serializers/user.py:95
-msgid "Username must be 6-20 characters long"
-msgstr "用户名必须为6-20个字符"
+msgid "Username must be 4-20 characters long"
+msgstr "用户名必须为4-20个字符"
 
 #: users/serializers/user.py:108 users/serializers/user.py:244
 msgid ""

apps/locales/zh_Hant/LC_MESSAGES/django.po

@@ -3618,8 +3618,8 @@ msgid "Phone"
 msgstr "手機"
 
 #: users/serializers/user.py:95
-msgid "Username must be 6-20 characters long"
-msgstr "用戶名必須為6-20個字符"
+msgid "Username must be 4-20 characters long"
+msgstr "用戶名必須為4-20個字符"
 
 #: users/serializers/user.py:108 users/serializers/user.py:244
 msgid ""

apps/users/serializers/user.py

@@ -93,7 +93,7 @@ class UserInstance(serializers.Serializer):
             validators=[
                 validators.RegexValidator(
                     regex=re.compile("^.{4,20}$"),
-                    message=_('Username must be 6-20 characters long')
+                    message=_('Username must be 4-20 characters long')
                 )
             ]
         )
@@ -114,7 +114,7 @@ class UserInstance(serializers.Serializer):
         nick_name = serializers.CharField(
             required=True,
             label=_("Nick name"),
-            max_length=64,
+            max_length=20,
         )
         phone = serializers.CharField(
             required=False,
@@ -232,7 +232,7 @@ class UserEditInstance(serializers.Serializer):
         nick_name = serializers.CharField(
             required=True,
             label=_("Name"),
-            max_length=64,
+            max_length=20,
         )
         phone = serializers.CharField(
             required=False,