Retrieve a specific verification transaction.

Retrieve a specific verification transaction that is associated with an authenticator registration.

Entitlements:
- manageAuthenticatorsAnyUser (Manage authenticator registrations for all users)
- readAuthenticatorsAnyUser (Read authenticator registrations for all users)
- manageAuthenticators (Manage authenticator registrations for yourself)
- readAuthenticators (Read authenticator registrations for yourself)
- authnAnyUser (Can perform authentication flows for other end users.)
- authn (Can perform own authentication flows.)
- verifyAuthenticator (Use IBM Verify.)