Return all essential email templates

Example response

{
  "data": [
    {
      "id": "588f7ee98f138b19220041a7",
      "name": "self_serve_welcome"
    }
  ],
  "access": [
    {
      "ids": [
        "588f7ee98f138b19220041a7"
      ]
    }
  ]
}