Helo.configure do |config|
  config.access_token = "YOUR_BEARER_TOKEN"
end

id = "550e8400-e29b-41d4-a716-446655440000"
Helo::Domains.verify(id)

{
  "domainKeyActive": {
    "host": "<string>",
    "value": "<string>"
  },
  "domainKeyPending": {
    "host": "<string>",
    "value": "<string>"
  },
  "returnPath": [
    {
      "host": "<string>",
      "value": "<string>"
    }
  ],
  "tracking": {
    "host": "<string>",
    "value": "<string>"
  },
  "unsubscribe": {
    "host": "<string>",
    "value": "<string>"
  }
}