Add a default owner for an integrator.

{
  "message": "Successfully added a new default owner for the integrator.",
  "resource": "integrator-defaults",
  "data": {
    "integrator": "019e6e75-0d07-7032-8aac-8047380f813e",
    "has-owner": true,
    "owner": "019e6e75-0d1a-7ee6-afa3-c40b9b6ce2e1",
    "dev-defaults": null,
    "prod-defaults": null
  }
}

{
  "message": "No existing organization member was not found when adding default owner.",
  "errors": []
}

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

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