diff --git a/accounts/user_login_backend.py b/accounts/user_login_backend.py
deleted file mode 100644
index 73cdca1..0000000
--- a/accounts/user_login_backend.py
+++ /dev/null
@@ -1,26 +0,0 @@
-from django.contrib.auth import get_user_model
-from django.contrib.auth.backends import ModelBackend
-
-
-class EmailOrUsernameModelBackend(ModelBackend):
-    """
-    允许使用用户名或邮箱登录
-    """
-
-    def authenticate(self, request, username=None, password=None, **kwargs):
-        if '@' in username:
-            kwargs = {'email': username}
-        else:
-            kwargs = {'username': username}
-        try:
-            user = get_user_model().objects.get(**kwargs)
-            if user.check_password(password):
-                return user
-        except get_user_model().DoesNotExist:
-            return None
-
-    def get_user(self, username):
-        try:
-            return get_user_model().objects.get(pk=username)
-        except get_user_model().DoesNotExist:
-            return None