title: null value in column "last_login" violates not-null constraint
body: <p>Having issues getting rid of this error.</p>
  
  <p>I'm trying to use Digital Ocean to deploy my Django app. I configured Postgres, but when I'm trying to register a new user in my app, I get this problem. </p>
  
  <p>I've tried running <code>python manage.py makemigrations</code> and <code>python manage.py migrate</code> and they work fine. The SQL migrations are completed upon migration.</p>