post https://api-v3.authenticating.com/mock/reauthenticate/link
This mimics the "ReAuthenticate Generate Link".
The possible scenarios are covered in the mock APIs with userAccessCodes
100385a1-4308-49db-889f-9a898fa88c21, 9cg686b3-ccb3-497c-a298-3830ea8a1c96 and 2d91a19f-d07b-48f0-912f-886ed67009dd.