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

send_message_request = Helo::SendMessageRequest.new(
  from: Helo::MailAddress1.new(email: "test-email", name: "test-name"),
  to: [],
  cc: [],
  bcc: [],
  reply_to: [],
  subject: "test-subject",
  html: "test-html",
  text: "test-text",
  template: {},
  tracking: {},
  attachments: [],
  tags: ["example1", "example2"],
  headers: {},
  metadata: {}
)
Helo::Sending.broadcast_message(send_message_request)

{
  "status": "<string>",
  "messageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "suppressions": [
    "<string>"
  ]
}