Provide clear "end to end" documentation of typical use case of Register service
Suggest creation of simple "Hello world" style example for real life utilization of this service.
Mention clearly if some steps cannot be tested from Postman (like other services) and will require some coding.
Also bring "notification" service in picture, if that is relevant.
For example, can this help in use case such as this? Data Manager is concerned about "Well" record in OSDU instance and would like to be notified if and when any user adds a new record, deletes an existing record or updates an existing record? If yes, describe how one can implement this with Register service and possibly other related service.
If not, please pick a different, meaningful real life use case and describe the full implementation.
You may do this separately for two cases which are already documented - (a) Action service, (b) How to become DDMS.