django 1.11

accounts/backends.py

@@ -3,7 +3,9 @@ from django.contrib.auth.backends import ModelBackend
 
 
 class EmailBackend(ModelBackend):
-    def authenticate(self, username, password=None, **kwargs):
+    def authenticate(self, request, username=None, password=None, **kwargs):
+        if not username:
+            return None
         UserModel = get_user_model()
         try:
             user = UserModel._default_manager.get(email__iexact=username)

adhesions/backends.py

@@ -6,7 +6,9 @@ from .models import Adhesion
 
 
 class AdhesionBackend(ModelBackend):
-    def authenticate(self, username, password=None, **kwargs):
+    def authenticate(self, username=None, password=None):
+        if not username:
+            return None
         if str(username).lower().startswith("adt"):
             username = str(username)[3:]
         try:

requirements.txt

@@ -1,3 +1,3 @@
-django<1.11
+django<1.12
 django-bootstrap3
 django_select2