Accounts API examples for interacting with child accounts via parent account APIs

[MarkTripod-Duo]

Description

Two new examples for the Accounts API are proposed to illustrate both the extraction of existing application integrations from a child account via a parent account API as well as the creation of new application integrations in child accounts.

Motivation and Context

This addition is in response to consumer feedback regarding the need for additional examples and documentation.

How Has This Been Tested?

These examples were test for both success and failure scenarios against internal Duo accounts.

Types of Changes

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