Fif you enable auto creation, make sure that all the information needed (firstname, lastname, email, potentially email verified) are filled from the provider
Fgithub does have the problem, that the email is only sent if the user has it publicly available
FSorry i am not sure what your question is.
FIs the question how to create users?
Fyou can either use our management ui, to create users, or implement it in your own application by using our apis
Fyes we recommend using a service account