Not so atomic, sorry

member/forms.py

@@ -0,0 +1,17 @@
+# -*- mode: python; coding: utf-8 -*-
+# Copyright (C) 2018-2019 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from django.contrib.auth.forms import UserChangeForm
+
+
+class CustomUserChangeForm(UserChangeForm):
+    """
+    Make first name, last name and email required
+    in the default Django Auth User model
+    """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['first_name'].required = True
+        self.fields['last_name'].required = True
+        self.fields['email'].required = True