microsoft-graph-toolkit | Authentication Providers and UI components | Content Management System library

I'm trying to use my own MSAL code to work together. Developed with .NET Core 5 MVC. I have similar problem as I found in below link. But I just don't know how to make it work with the proposed answer. Or in other words, I'm still confuse how this integration is done.

[It is mandatory to use the login component in order to use the other components]It is mandatory to use the login component in order to use the other components

[Quickstart for MSAL JS]https://github.com/microsoftgraph/microsoft-graph-toolkit/blob/main/samples/examples/simple-provider.html

I also have read following article too: [Simple Provider Example]https://github.com/microsoftgraph/microsoft-graph-toolkit/blob/main/samples/examples/simple-provider.html

[A lap around microsoft graph toolkit day 7]https://developer.microsoft.com/en-us/office/blogs/a-lap-around-microsoft-graph-toolkit-day-7-microsoft-graph-toolkit-providers/

is there someone can pointing to me more details explanation about how to archive this.

Can someone explains further below response further. How to do it. Where should I place the code and how to return AccessToken to SimpleProvider?

Edited:

Update my question to be more precise to what I want besides on top of the question. Below is the code I used in Startup.cs to automatically trigger pop up screen when user using the web app. When using the sample provided, it is always cannot get access token received or userid data. Question 2: How to save or store token received in memory or cache or cookies for later use by ProxyController and its classes.

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