Activates an existing client user. The state of the client user will be updated from "INACTIVE" to "ACTIVE". This method has no effect if the client user is already in "ACTIVE" state. An error will be returned if the client user to activate is still in "INVITED" state.
The URL uses gRPC Transcoding syntax.
The request body must be empty.
If successful, the response body contains an instance of
Requires the following OAuth scope: