post http://127.0.0.1:8080/spPortal/registration
Use this API to reset the GMS-Portal registration state and initiate new Registration cycle. There is no post data required for this API, to edit portal credentials (Account Key, Account Name, Group, Site) use /gmsConfig/spPortal. Registration cycle may take up to two minutes to get an update from Portal, use GET /spPortal/registration to poll.