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我有一个使用 Amplify Auth 的 Android 应用程序。我可以使用访客访问和密钥,但不能使用会话令牌。Postman 在使用临时凭证时需要会话令牌。

根据Amplify 文档,我使用此代码来获取密钥:

Amplify.Auth.fetchAuthSession(
    result -> {
        Log.i(TAG, "inside getGuestCredentials()...result....." + result.toString());

        AWSCognitoAuthSession cognitoAuthSession = (AWSCognitoAuthSession) result;
        Log.i(TAG, "Is user signed in: " + cognitoAuthSession.isSignedIn());

        switch (cognitoAuthSession.getIdentityId().getType()) {
            case SUCCESS:
                Log.i(TAG, "Guest IdentityId: " + cognitoAuthSession.getIdentityId().getValue());
                Log.i(TAG, "Guest access key: " + cognitoAuthSession.getAWSCredentials().getValue().getAWSAccessKeyId());
                Log.i(TAG, "Guest secret key: " + cognitoAuthSession.getAWSCredentials().getValue().getAWSSecretKey());
                String sessionToken = ((AWSSessionCredentials) mobileClient.getCredentials()).getSessionToken();
                Log.i(TAG, "Guest sessionToken: " + sessionToken);
                break;
            case FAILURE:
                Log.i(TAG, "failure Guest IdentityId not present because: " + cognitoAuthSession.getIdentityId().getError().toString());
                break;
            default:
                Log.i(TAG, "default guest session: " + cognitoAuthSession.toString());
                break;
        }
    },
    error -> Log.i(TAG, error.toString())
);

然后我使用一个实例AWSMobileClient(我使用逃生舱口获得)来获取会话令牌。

这工作了一段时间,但突然我开始收到这个 403 消息:

“消息”:“用户:arn:aws:sts::xxxxxx:assumed-role/amplify-xxxxxx-unauthRole/CognitoIdentityCredentials 无权执行:execute-api:Invoke on resource:arn:aws:execute-api:xxxxxyyyyyyzzzz "

如何获取会话令牌?

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