Prevent user email from being null

users/migrations/0090_auto_20200421_1825.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.28 on 2020-04-21 16:25
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0089_auto_20200418_0112'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='email',
+            field=models.EmailField(blank=True, default='', help_text='External email address allowing us to contact you.', max_length=254),
+        ),
+    ]

users/models.py

@@ -206,7 +206,7 @@ class User(
     )
     email = models.EmailField(
         blank=True,
-        null=True,
+        default="",
         help_text=_("External email address allowing us to contact you."),
     )
     local_email_redirect = models.BooleanField(