Get all admins

curl --request GET \
  --url https://api.helpyousponsor.com/v1/admin/email_manager/admins \
  --header 'X-HYS-API-Key: <api-key>'

{
  "admins": [
    {
      "id": 123,
      "name": "<string>",
      "email": "<string>"
    }
  ]
}