I personally don’t think that if you’re building an MVP you should be worrying that much about how to store users in the database and add RBAC and building a way to add middleware and a storage layer and all of that crap. It’s not worth it, your application is not a special snowflake.
Edit: Should say that with that I mean serving HTML via Django. Usually I would use Bootstrap for layout. Very occasionally I’d add an API for some interactivity but I think for most MVPs interactivity is likely to be a secondary concern until later.