Which REST API can I use to

[vincitydaimo]

Which REST API  can I use to

1. permission new users 

2. add them to different groups (say like as site collaborator etc)

[jpotts]

Generally helpful Swagger docs on the REST API:

Alfresco Content Services REST API Explorer 

REST API for creating people:

Alfresco Content Services REST API Explorer 

REST API for assigning people to sites:

Alfresco Content Services REST API Explorer 

You also might want to refer to the general Alfresco docs:

https://docs.alfresco.com