Updated Postman Utility per new changes to support oAuth migration

[chrispanella]

The changes are for B2B CDP Customers for initial setup. Our API Projects in AEP platform are migrating to oAuth vs JWT. This change is to support and migrate to the new oAuth authentication.

Description

The changes are for B2B CDP Customers for initial setup. Our API Projects in AEP platform are migrating to oAuth vs JWT. This change is to support and migrate to the new oAuth authentication.

Related Issue

https://jira.corp.adobe.com/browse/B2BAEP-6456

Motivation and Context

Required because JWT access tokens are deprecated and only new oAuth connections are allowed.

How Has This Been Tested?

Tested with support engineers and internal teams

Screenshots (if appropriate):

Types of changes

• [ x ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ x ] I have signed the Adobe Open Source CLA.
• [ x ] My code follows the code style of this project.
• [ x ] My change requires a change to the documentation.
• [ x ] I have updated the documentation accordingly.
• [ x ] I have read the CONTRIBUTING document.
• [ x ] I have added tests to cover my changes.
• [ x ] All new and existing tests passed.