How to use Aws Cognito Access Token

[hussainamir]

Dear
First of all I would like to thank you to explain signv4 example.

In this example you have used Access Key, Secret Key, from IAM. And this also work from my side.

But if I try to use Access Key and Secret key that is generated by AWS Cognito user then it's not working,

I try to use Access key and secret key with Amazon.IotData.AmazonIoTClient(AccessKey,SecretKey,HostlUrl) but it's fail, when I use access token that is generated by Cognito user then it's work.

My question is how we can use access token with signV4.

Thanks in Advance