diff --git a/apps/authentication/middleware.py b/apps/authentication/middleware.py
index d1f3b087b..5b7f2fe5e 100644
--- a/apps/authentication/middleware.py
+++ b/apps/authentication/middleware.py
@@ -77,6 +77,7 @@ class ThirdPartyLoginMiddleware(mixins.AuthMixin):
         ip = get_request_ip(request)
         try:
             self.request = request
+            self.check_is_block()
             self._check_third_party_login_acl()
             self._check_login_acl(request.user, ip)
         except Exception as e:
diff --git a/apps/users/utils.py b/apps/users/utils.py
index bb9877a70..1119eb9ab 100644
--- a/apps/users/utils.py
+++ b/apps/users/utils.py
@@ -125,7 +125,7 @@ class BlockUtilBase:
     BLOCK_KEY_TMPL: str
 
     def __init__(self, username, ip):
-        self.username = username
+        username = username.lower() if username else ''
         self.ip = ip
         self.limit_key = self.LIMIT_KEY_TMPL.format(username, ip)
         self.block_key = self.BLOCK_KEY_TMPL.format(username)