Retrieve user groups in Startup.cs

[sameer-kumar]

Bug description A clear and concise description of what the bug is.

Repro steps I'm trying to modify the your sample to pull user group membership in Startup.cs class file so that I can add user groups as claims. But I could not make it to work. Is it something not possible or I'm doing something wrong? Can you please help me with sample code or pointers? Thank you!

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