How to login an user with a user ID instead of user's email address?

[ockan]

How to login an user with a user ID instead of user's email address?

[gi0baro]

Can you clarify/expand this a bit?
Would be useful to provide a detailed answer having the actual use-case and/or a MRE.

[ockan]

e.g. in a company,we develop a internal web site,it use employee ID(such as a number,a abbreviate name) and password to login internal web site

[gi0baro]

So you just need a custom form for it.

I'd say the easiest path is to define your own login_fields function based on the original one (https://github.com/emmett-framework/emmett/blob/master/emmett/tools/auth/forms.py#L41-L49) and then re-register the form using that function (copying https://github.com/emmett-framework/emmett/blob/master/emmett/tools/auth/forms.py#L107-L111 and replacing the login_fields param with your function).
You just need to do that in your code before initializing the auth module.

[ockan]

redefined login_fields and re-registered it with @AuthForms.register_for("login", fields=login_fields) in login_form(auth, fields, **kwargs),
when run, cannot leave login page(or repeatly show login page?), did not jump to actual web page