Some user do not have a registration date

users/migrations/0029_auto_20190810_1121.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.4 on 2019-08-10 09:21
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0028_auto_20190810_1003'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='date_joined',
+            field=models.DateTimeField(default=django.utils.timezone.now, null=True, verbose_name='date joined'),
+        ),
+    ]

users/models.py

@@ -4,6 +4,7 @@
 
 from django.contrib.auth.models import AbstractUser
 from django.db import models
+from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 
 from med.settings import MAX_EMPRUNT
@@ -34,6 +35,11 @@ class User(AbstractUser):
         max_length=255,
         blank=True,
     )
+    date_joined = models.DateTimeField(
+        _('date joined'),
+        default=timezone.now,
+        null=True,
+    )
 
     REQUIRED_FIELDS = ['first_name', 'last_name', 'email']