update python aad sample

[terencefan]

No description provided.

[vicancy]

invoke server negotiate endpoint to get the url instead

[microsoft-github-policy-service]

@terencefan please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

Options:

• (default - no company specified) I have sole ownership of intellectual property rights to my Submissions and I am not making Submissions in the course of work for my employer.

@microsoft-github-policy-service agree

• (when company given) I am making Submissions in the course of work for my employer (or my employer has intellectual property rights in my Submissions by contract or applicable law). I have permission from my employer to make Submissions and enter into this Agreement on behalf of my employer. By signing below, the defined term “You” includes me and my employer.

@microsoft-github-policy-service agree company="Microsoft"

Contributor License Agreement

Contribution License Agreement

This Contribution License Agreement (“Agreement”) is agreed to by the party signing below (“You”),
and conveys certain license rights to Microsoft Corporation and its affiliates (“Microsoft”) for Your
contributions to Microsoft open source projects. This Agreement is effective as of the latest signature
date below.

1. Definitions.
   “Code” means the computer software code, whether in human-readable or machine-executable form,
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3. Originality of Work. You represent that each of Your Submissions is entirely Your original work.
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• Copyright License. You grant Microsoft, and those who receive the Submission directly or
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• Other Rights Reserved. Each party reserves all rights not expressly granted in this Agreement.
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6. Representations and Warranties. You represent that You are legally entitled to grant the above
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