Configure AWS Cognito Custom Login in swift 3/4 so to be able to access dynamo db

I have used AWS Mobile Hub for my iOS Project

Hub Project : kinsouls
Language: Swift. iOS

I have custom UI for Signup and Singing so not using AWSAuthUI

I was able to successfully setup Signup by following the documentation and am able to see confirm users in the user pool.

I am facing issue in DynamoDB Access (Authentication issue)

Bellow link is the code is am using for Login

[login to view URL]

Upon successful login I am trying to save into the dynamodb model I have created

[login to view URL] - 
Gives error nil for identityId along with
Amazon DynamoDB Save Error: Error Domain=[login to view URL] Code=8 "(null)" UserInfo={__type=NotAuthorizedException, message=Unauthenticated access is not supported for this identity pool.}


not sure where am not able to find anything further in the documentation.

Amazon Web Services iPhone Mobile App Development Swift

Proje NO: #16973563

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