combining pkce enum types

[debasisdwivedy]

Converting the code below:

if auth_type is None:
        return "pkce"
if auth_type.lower() in _pkce_options:
        return "Pkce"

to

if auth_type is None or auth_type.lower() in _pkce_options:
        return "Pkce"

[kumare3]

wy?

[kumare3]

also this changes the import back to click we want to continue using rich_click

[debasisdwivedy]

Reverted it back. But i think would be better as it would only import the exceptions from the click package. rich-click does not have exception module exposed, it internally calls click.exception. It does not show during static code analysis and might create problems at runtime.

This would even better as we are explicitly calling the exception package:

from click.exceptions import Exit, NoArgsIsHelpError

We can add it later if we find any issue