How I can add Register/Signup functionality in app, I didn’t see anything in docs related to that.
currently there is /login route not for signup by default the only I can see is to add User from Desk.
You can enable sign up in website settings. Mine is currently disabled - have never used it, so can’t speak to the process or suitability for your application.
with this signup user can’t set its password someone has to set it through Desk after filling the form.