How to implement Asp.net core 2 with Identity server 4?

Question

I found some demo for Asp.net core 2 + Identity server 4 but I need to implement combination as below:

 

Asp.net Core 2 + identity + Identity server 4 + web api + External logins.

 

 

Is there any way to implement interconnected all this in one solution?

 

 

Please provide any sample code.

It will help me a lot.

 

Thanks in advance