curl --request POST \
  --url https://api.steuerboard.com/v1/workspaces/{id}/members \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-client-id: <x-client-id>' \
  --data '{
  "userId": "<string>"
}'

{
  "createdAt": "<string>",
  "updatedAt": "<string>",
  "workspaceId": "<string>",
  "isMuted": true,
  "userId": "<string>",
  "user": {
    "id": "<string>",
    "email": "<string>",
    "firstName": "<string>",
    "lastName": "<string>"
  }
}