/// <summary>
/// search users
/// http://developer.github.com/v3/search/#search-users
/// </summary>
/// <param name="search"></param>
/// <returns>List of users</returns>
public IObservable <SearchUsersResult> SearchUsers(SearchUsersRequest search)
{
Ensure.ArgumentNotNull(search, nameof(search));
return(_client.SearchUsers(search).ToObservable());
}