Try to use the CLI password for logins

[DL6ER]

What does this implement/fix?

This PR accompanies PR pi-hole/FTL#1999

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Related issue or feature (if applicable): N/A

Pull request in docs with documentation (if applicable): N/A

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[PromoFaux]

Tested with and without webserver.api.cli_pw enabled

disabled = prompts for password and then works
enabled = works without password prompt

👍

Happy to approve once suggestions resolved