diff --git a/rest_framework/authtoken/serializers.py b/rest_framework/authtoken/serializers.py
index 580ef57c5..ac933f579 100644
--- a/rest_framework/authtoken/serializers.py
+++ b/rest_framework/authtoken/serializers.py
@@ -16,7 +16,6 @@ class AuthTokenSerializer(serializers.Serializer):
         username = attrs.get('username')
         password = attrs.get('password')
 
-
         user = authenticate(request=self.context.get('request'),
                             username=username, password=password)
 
@@ -27,6 +26,5 @@ class AuthTokenSerializer(serializers.Serializer):
             msg = _('Unable to log in with provided credentials.')
             raise serializers.ValidationError(msg, code='authorization')
 
-
         attrs['user'] = user
         return attrs