fix(back): adapt email or username backend authentication

back/authentication/backend_authentication/email_backend.py

@@ -3,11 +3,11 @@
 
 
 class EmailBackend(ModelBackend):
-    def authenticate(self, request, email=None, password=None, **kwargs):
+    def authenticate(self, request, username=None, password=None, **kwargs):
         UserModel = get_user_model()
 
         try:
-            user = UserModel.objects.get(email=email)
+            user = UserModel.objects.get(email=username)
         except UserModel.DoesNotExist:
             # Run the default password hasher once to reduce the timing
             # difference between an existing and a nonexistent user.

back/authentication/backend_authentication/email_password_authentication.py

@@ -5,14 +5,14 @@
 
 class EmailOrUsernamePasswordAuthentication(BaseAuthentication):
     def authenticate(self, request):
-        username = request.data.get('username')
-        email = request.data.get('email')
+        username_or_email = request.data.get('username')
         password = request.data.get('password')
 
-        if not password or not (username or email):
+        if not password or not username_or_email:
             raise AuthenticationFailed('No credentials provided')
 
-        user = authenticate(request, username=username, email=email, password=password)
+        # Will try on several auth backend to authenticate user
+        user = authenticate(request, username=username_or_email, password=password)
         if not user:
             raise AuthenticationFailed('Invalid credentials')