Microservices Authentication article uses open source library that is no longer supported

**Issue description**

The article "Make secure .NET Microservices and Web Applications" heavily leans on the non longer supported framework Identity Server 4

Page URL:
https://learn.microsoft.com/en-us/dotnet/architecture/microservices/secure-net-microservices-web-applications/

Page Id (I think): ff9b78ce-a923-e763-08d5-c31cbb6a1f0e

**Target framework**

- [x ] .NET Core greater than 3.1
- [ ] .NET Framework
- [ ] .NET Standard

This article uses Identity Server 4 as its main example of an open source framework. Support for ID Server 4 ended in December 2022. The project has moved to commercial software.

I haven't used the other framework mentioned, so can't say whether it's an easy update to the article or not.

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#### Document Details

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* ID: d926868f-5446-63c6-75c0-ba879879f4b5
* Version Independent ID: ff9b78ce-a923-e763-08d5-c31cbb6a1f0e
* Content: [Securing .NET Microservices and Web Applications](https://learn.microsoft.com/en-us/dotnet/architecture/microservices/secure-net-microservices-web-applications/)
* Content Source: [docs/architecture/microservices/secure-net-microservices-web-applications/index.md](https://github.com/dotnet/docs/blob/main/docs/architecture/microservices/secure-net-microservices-web-applications/index.md)
* Product: **dotnet-architecture**
* Technology: **microservices**
* GitHub Login: @mjrousos
* Microsoft Alias: **dapine**