Adding a block where an admin can create users on the fly What methods are there for creating users on the fly for Drupal 8 in a block? I'm creating a page where the admin can create content, but also there is a user reference field. I currently have it expose current users in the system that you can choose from. In order for me to create a new user to the list, I have to goto the admin/people/create page, but what methods are there to expose this user creation form on the content creation page? 

I tried inline_entity_form but that doesn't work as it is still in alpha. It's best if I can just do this in core. Ajax isn't necessary as reloading the page is ok.
Well, it's a great opportunity for you to learn how to write a custom block, and a custom form in it:


Create a new block in one of your module
Create a custom form in it. 
Place your block somewhere in your page. You are done! 


For both block and form creation there are nice articles just for Drupal 8. 

Good luck!