OSS服务器上传图片

我将github上的应用代码下载下来，实例demo地址https://github.com/aliyun/aliyun-oss-android-sdk?spm=a2c4g.11186623.2.9.VgBQlR，然后按照github上的说明采用STS认证模式来初始化移动OSSCLITEN代码如下

public OssService initOSS(String endpoint, String bucket, UIDisplayer displayer) {
    OSSCredentialProvider credentialProvider;
     credentialProvider = new OSSStsTokenCredentialProvider("LTAIcnKbMJEgRHD8", "8e5qbHcW5RFBkd8HtWjDpnm3EclJIu", "pdafile");
    String editBucketName = ((EditText) findViewById(R.id.bucketname)).getText().toString();
    if (TextUtils.isEmpty(editBucketName)) {
        editBucketName = bucket;
        ((EditText) findViewById(R.id.bucketname)).setText(bucket);
    }
    ClientConfiguration conf = new ClientConfiguration();
    conf.setConnectionTimeout(15 * 1000); // 连接超时，默认15秒
    conf.setSocketTimeout(15 * 1000); // socket超时，默认15秒
    conf.setMaxConcurrentRequest(5); // 最大并发请求书，默认5个
    conf.setMaxErrorRetry(2); // 失败后最大重试次数，默认2次
    OSSLog.enableLog();
    OSS oss = new OSSClient(getApplicationContext(), endpoint, credentialProvider, conf);
    return new OssService(oss, editBucketName, displayer);

}

然后上传图片报错，报错The OSS Access Key Id you provided does not exist in our records.!