Add a default owner for an integrator.

{
  "message": "Successfully removed default owner for integrator.",
  "resource": "integrator-defaults",
  "data": {
    "integrator": "019e16f3-9a47-775a-92e8-00d7266582fb",
    "has-owner": false,
    "owner": null,
    "dev-defaults": null,
    "prod-defaults": null
  }
}

{
  "message": "You have to be authorized to access this resource."
}

{
  "message": "Access denied for user."
}

{
  "message": "Integrator does not have defaults saved."
}