New user cannot login after registering
Expected behaviour
Can create a new user account in the Register step and then can log in with the username and password used in the Register step.
Current behaviour
After I successfully create a user account, I can't login with those details, on https://ncbidev.cloud68.co/ and https://ncbi.cloud68.co/. The validation in the UI says 'Username is not valid'. I logged in to an existing account and can see the user in the Users table from the dashboard, and even if I assign them as a System Admin they still can't login because of the username validation saying 'Username is not valid', they can't click the 'Login' button.