code: func helloEmail() []byte {
  	address := "test@example.com"
  	name := "Example User"
  	from := mail.NewEmail(name, address)
  	subject := "Hello World from the SendGrid Go Library"
  	address = "test@example.com"
  	name = "Example User"
  	to := mail.NewEmail(name, address)
  	content := mail.NewContent("text/plain", "some text here")
  	m := mail.NewV3MailInit(from, subject, to, content)
  	address = "test2@example.com"
  	name = "Example User"
  	email := mail.NewEmail(name, address)
  	m.Personalizations[0].AddTos(email)
  	return mail.GetRequestBody(m)
  }
docs: // Minimum required to send an email