Added link to Azure Active Directory example implementation

[victorp13]

No description provided.

[fzaninotto]

Your repo doesn't contain an actual, reusable authProvider, it's rather a proof-of-concept. I'd prefer if you could publish your code as a npm package that people could reuse.

[victorp13]

I am very new to JS so am being careful to make npm packages. However, I consider my example to be very clean, and hence still a valuable addition to your documentation. I've seen people asking questions (to you, but also to the MSAL team) on how to do this type of integration: My repo can help them.

Even without a ready-made package/authProvider my example can be useful. I will look at creating an authProvider, but it's up to you.

[fzaninotto]

I've created a distinct section for tutorials in the documentation. I'll add your tutorial, as well as a few others, in #6535. Thanks for your contribution!