/// <summary>
 /// Deletes email addresses for the authenticated user.
 /// </summary>
 /// <remarks>
 /// http://developer.github.com/v3/users/emails/#delete-email-addresses
 /// </remarks>
 /// <param name="emailAddresses">The email addresses to delete.</param>
 /// <returns>Returns the added <see cref="EmailAddress"/>es.</returns>
 public IObservable <Unit> Delete(params string[] emailAddresses)
 {
     return(_client.Delete(emailAddresses).ToObservable());
 }