Set a user attribute for users

post https://api.sigmacomputing.com/v2/user-attributes/{userAttributeId}/users

Assign and set the value of a specific user attribute for one or more users.

Retrieve the userAttributeId by calling the /v2/user-attributes endpoint.
Specify one or more users by userId. Retrieve the userId by calling the /v2/members endpoint and using the memberId included in the response.