Add support for acquiring a token with a pre-signed JWT

[lochiiconnectivity]

JWT.

Useful for where the signing takes place externally for example using
Azure Key Vault (AKV).

AKV sample included.

This is the MSAL version of This pull

[rayluo]

Nice to meet you, again, David! :-) We will definitely take a look into this.

[lochiiconnectivity]

prod

[rayluo]

Thank you, David, for your patience, and your comprehensive work on this PR! It is rare to see a contributor PR with this level of test coverage. You are awesome!

We added some comments below. If you can make some adjustment, that would be great.

[jiasli]

PR tile is malformed.

[rayluo]

Thanks @jiasli for the review, too!

@lochiiconnectivity , I added some changes mainly to the docs, as yet another PR to your feature branch. Please help proofread and merge that PR when done. We will take care of this PR after that.

[rayluo]

Feature-wise, this is completed. Approving now.

Somehow github reports a conflict which prevents my merge attempt. @lochiiconnectivity would you mind fixing this by a rebase-to-dev or merge-from-dev? Never mind. David might not be able to see the merge conflict from github ui. I can try a manual fix locally.

[lochiiconnectivity]

I've resolved the merge conflict by hand, no need for rebase - it was minor.

[rayluo]

Thanks David for driving this to the finish line! It will be included in our next release. At that time we will leave another note in this PR, so you will receive a notification. Meanwhile, relax and be proud. :-)

[rayluo]

Hi Dave (@lochiiconnectivity ), I mean to reply your email today but somehow my response won't be sent. Just letting you know that we are still working on another feature which was also scheduled in the next release but took longer than expected. Don't worry. Our next release will automatically include all the features currently in dev branch.

Meanwhile, there is a workaround for you. You can use the following line to install the "cutting-edge" MSAL which includes your PR. Later when MSAL 1.13 is released, you simply switch that line back to the normal "pip install msal", without any code changes in your project.

pip install git+https://github.com/AzureAD/microsoft-authentication-library-for-python.git@dev

Thanks again for your patience and understanding.

[lochiiconnectivity]

Thanks, but we're waiting to publish software tied to 1.13 (as in msal=1.13 in requirements.txt), we can't do this without a published module , so we want you to publish 1.13 as soon as possible please.

[rayluo]

Hi Dave (@lochiiconnectivity ), thanks for your patience. MSAL 1.13 has been released just now! Also thank you very much for your contribution!