/// <summary>
/// Retrieves the user by username and password.
/// </summary>
/// <param name="username">The username.</param>
/// <param name="password">The password.</param>
/// <returns></returns>
public User RetrieveUserByUsernameAndPassword(string username, string password)
{
User user = _resource.RetrieveUserByUsernameAndPassword(username, password);
return(user);
}