Document env[AUTO_ACCEPT] presence in create_admin_user() output

[tuxayo]

Our continuous integration was blocked until death in setup because of the prompt for the admin user.
I had the hardest time finding how to auto accept and luckily I ended up there:

spree_auth_devise/db/default/users.rb

Line 37 in a141130

if ENV['AUTO_ACCEPT']

Is there some documentation that I missed about the necessity of this variable for automating the app setup?

What do you think about mentioning the AUTO_ACCEPT variable in the prompt message to avoid other people from being stuck when setting up their CI? (I would do a PR with pleasure if this proposal is accepted)

[bxt]

I recently ran into this problem too. My CI crashed with the message EOFError: The input stream is exhausted. when asked for the admin user email. I finally landed on a spree guide explaining the solution for non-interactive setup of the spree seeds with this gem. However, this one is for a cloud service that no longer exists. So it would probably be a good idea to document this in the README or something, right?