curl --request POST \
  --url https://{defaultHost}/v1/workspaces/{workspace_id}/memberships \
  --header 'X-Authorization: <api-key>'

{
  "membership": {
    "id": "<string>",
    "user_id": "<string>",
    "workspace_id": "<string>",
    "role": "<string>",
    "status": "<string>",
    "invitation_token": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "user": {
      "id": "<string>",
      "email": "<string>",
      "name": "<string>"
    }
  },
  "workspace_membership": {
    "id": "<string>",
    "role": "<string>",
    "status": "<string>",
    "created_at": "2023-11-07T05:31:56Z"
  }
}