R1:6fb43305be70

Convert Passhrase to handleRequest

Summary: Converts Passphrase

Test Plan: New Cred, Edit Cred, Lock, view, destroy

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T8628

Differential Revision: https://secure.phabricator.com/D13726