create temporary user with an invalid & random email address

(authentic doesn't allow None to be used anymore)

src/authentic2_auth_fedict/views.py

@@ -14,6 +14,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import random
+
 from django.core import signing
 from django.urls import reverse
 from django.db import transaction
@@ -59,7 +61,7 @@ class LoginView(mellon.views.LoginView):
             user.is_active = False
             user.save()
             data = {}
-            data['email'] = None
+            data['email'] = 'adresse@email.invalid#%s' % random.randint(0, 10000000)
             data['confirm_data'] = True
             data['valid_email'] = False
             data['skip_email_check'] = True