How to do AWS Oauth / SAML Login

Question

I am trying to build a feature where my application's user can give my application access to AWS, but I am not able to find the proper documentation to do it.

Scenario:

1. User logs in my application

2. User clicks on connect to aws

3. Redirected to AWS screen

4. Logs - in and give me consent to the permission I need

5. Gets redirected back to my app,

6. I get the code in backend

7. I exchange it to do whatever I do, basically creating an IAM account.

I went through - User Pool, Identity Pool, IAM Identity Center (Customer applications)

But unable to achieve it but was fairly simple for google.