fix client id matching

[colintremblay-okta]

Client IDs for 1st party apps (like Okta Personal's iOS app) have don't match the regex. Since we have access to the client ID, we can first do a check against that instead of the regex, then default the the current behavior if that doesn't work.

This PR:

• covers the failing scenario with a unit test
• fixes the failing scenario
• also fixes a small documentation issue (removes a parameter from the docs that isn't in the actual function)

[mikenachbaur-okta]

This looks great! I'll target a feature branch with this PR and will trigger a new PR from there to ensure the UI tests run.