用的是rest api封装的客户端 因为返回的结果HTTP STATUS CODE可能是NOT FOUND或者其他 正常是返回一个文件流 错误是返回一个字符串

我不知道该如何调用了，
直接
var obj = api.Token.DownloadAsync(new LoginModel(){"UserName":"aa","Password":"bb'} );
后这个obj属性是尚未计算 应该是还么有执行方法
哪位知道该如何写 谢谢了~

public static partial class TokenExtensions

        /// <param name='operations'>
        /// The operations group for this extension method.
        /// </param>
        /// <param name='loginModel'>
        /// </param>
        /// <param name='cancellationToken'>
        /// The cancellation token.
        /// </param>
        public static async Task<object> DownloadAsync(this IToken operations, LoginModel loginModel, CancellationToken cancellationToken = default(CancellationToken))
        {
            using (var _result = await operations.DownloadWithHttpMessagesAsync(loginModel, null, cancellationToken).ConfigureAwait(false))
            {
                return _result.Body;
            }
        }

}