Sample: using DefaultAzureCredential to access CosmosDB

[M-Lipin]

Purpose

• To add the sample demonstrating the usage of Azure AD passwordless credentials (DefaultAzureCredential) to access Cosmos DB.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

How to Test

• Need to review the sample project and try it to access Cosmos DB with passwordless approach.

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• Need to ensure that the sample is valid.

Other Information

Is related to #572

[kushagraThapar]

LGTM, thanks!