As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.
Which REST API can I use to
1. permission new users
2. add them to different groups (say like as site collaborator etc)
Generally helpful Swagger docs on the REST API:
Alfresco Content Services REST API Explorer
REST API for creating people:
REST API for assigning people to sites:
You also might want to refer to the general Alfresco docs:
https://docs.alfresco.com