Send invitations to join an organization

{
  "status": "success",
  "status_code": 200,
  "message": "Invitations sent successfully",
  "data": [
    {
      "email": "user@example.com",
      "expires_at": "2024-07-29T13:53:02+01:00",
      "organization": "testorg"
    }
  ]
}