com.amazonaws.services.cognitoidentity.model.NotAuthorizedException：无效的登录令牌。无法传递Cognito令牌

Question

我在我的Android应用中使用开发者身份验证。成功登录后，服务器将向客户端发送Cognito令牌。此令牌的目的是为了访问Amazon S3来上传图像。

我在这里创建了一个示例项目：TestAWSCognito

这是我尝试创建AmazonS3Client的代码段代码：

String identityPoolId = "eu-west-1:289fd4a0-2236-4ff4-9c2b-61c93e60bf0a";

AmazonS3Client testClient = null;

Map<String, String> loginsMap = new HashMap<>();
loginsMap.put("cognito-identity.amazonaws.com", "eyJraWQiOiJldS13ZXN0LTExIiwidHlwIjoiSldTIiwiYWxnIjoiUlM1MTIifQ.eyJzdWIiOiJldS13ZXN0LTE6MjkyM2IxYWQtNGNiYS00ZTFmLWEyY2YtZGIyNDVmM2Q3NWJiIiwiYXVkIjoiZXUtd2VzdC0xOjI4OWZkNGEwLTIyMzYtNGZmNC05YzJiLTYxYzkzZTYwYmYwYSIsImFtciI6WyJhdXRoZW50aWNhdGVkIiwiZ3JhcGhxbC5oYXJhaiIsImdyYXBocWwuaGFyYWo6ZXUtd2VzdC0xOjI4OWZkNGEwLTIyMzYtNGZmNC05YzJiLTYxYzkzZTYwYmYwYTo1NjI4NDAiXSwiaXNzIjoiaHR0cHM6Ly9jb2duaXRvLWlkZW50aXR5LmFtYXpvbmF3cy5jb20iLCJleHAiOjE1NDUxNDgzMTYsImlhdCI6MTU0NTA2MTkxNn0.V-iZeAQdsdMb9LkzYNucka5PEYRMBKKTGm5CzZIJYg8Z5ehcq562JbXGJWr7Yea-w2APsbpVxgP8EjHxSLjsMggk2FdVd-m8YhNFwBYL91oph-wFiAIxLVginD3t3_EhmkPduXZgM1mwH1_yNsGqpBY4nr15cgjqLvfyb4t-QJADFFyjd2qpIUoNzU2EQ5ypEKmbVdgOeLCIe6a-L09yzO-M1xdC0Onc8fs5ELOISR8FA5YFJYIgyqfSz9wDmz929rmCV9EjFdNC3Jd_hSC_Ofp6NYjiW1HRTU0a2C3Z3FCNJFzKppQSUt78MWrJblhHJSEboeMoKhzxmkA0VPgNjg");


CognitoCredentialsProvider cognitoCredentialsProvider = new CognitoCachingCredentialsProvider(getApplicationContext(), identityPoolId, Regions.EU_WEST_1);
cognitoCredentialsProvider.setLogins(loginsMap);

try {
    AmazonS3Client testClient = new AmazonS3Client(cognitoCredentialsProvider.getCredentials());

    if (testClient != null) {
        return testClient;
    }
}
catch (Exception e) {
    e.printStackTrace();
}

token和identityPoolId仍然有效。

创建AmazonS3Client时会返回异常：com.amazonaws.services.cognitoidentity.model.NotAuthorizedException: Invalid login token. Can't pass in a Cognito token. (Service: AmazonCognitoIdentity; Status Code: 400; Error Code: NotAuthorizedException; Request ID: af373152-0452-11e9-b8c4-c3f49006c33b)

任何帮助将不胜感激。谢谢！