Bug: can() returns an error when user is not logged in #750

PHP Version

8.1

CodeIgniter4 Version

4.3.5

Shield Version

1.0.0-beta.7

Which operating systems have you tested for this bug?

Windows, Linux

Which server did you use?

apache

Database

MySQL

Did you customize Shield?

No

What happened?

When i want to check permissions with can() and the user is not logged in shield produces an error. I always have to check with loggedIn() before using can().

Steps to Reproduce

Try to get a permission for guests.

Expected Output

can() should return false if a user is not logged in. It would also be nice to handle guests as a usergroup so users not logged in can have permissions too.

Anything else?

No response