Add Member

Add a user as a member of a target.

POST `/:target/:target_id/members`

Parameter	Type	Required	Description
`target`	string	Yes	Resource type: `orgs` or `blobs`.
`target_id`	string	Yes	The unique ID of the target resource.

Parameter	Type	Required	Description
`user_id`	string	Yes	The ID of the user to add.
`role`	string	Yes	Role to assign: `admin`, `write`, or `read`.

Parameter	Type	Description
`member`	object	The created member object.

{
  "user_id": "user_789",
  "role": "write"
}