Add Workspace Member

curl --request POST \
  --url https://api.altostrat.io/workspaces/{workspace_id}/members \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "user_id": "<string>",
  "role": "owner"
}'

{
  "user_id": "<string>",
  "workspace_id": "<string>",
  "role": "owner",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}