Appreciate all the time you've spent on this! Your detail is great for us to understand the different ways we can authenticate. Does your plugin allow for an easy way of checking if a username is unique or email is unique? I am designing a registration flow right now that is asking for 1 field per page because mobile is tough to have a giant form. I'm asking for username on screen 1, email on screen 2, then password on the last screen before submission. I would ideally like to check the uniqueness of username on screen 1 and uniqueness of email on screen 2 (instead of on full registration) so that we don't send users backwards in the flow. Is that something that's easy to check in your plugin?