Sure @sawal
Here is Linkedin OAuth documentation: https://docs.microsoft.com/en-us/linkedin/shared/authentication/authorization-code-flow?context=linkedin/consumer/context
The Linkedin plugin might work to let your users signup/login. You can simply use the Signup/Login with a social network action after installing it.
The way I did it was through API Connector, so I’m not sure 100% the plugin does the trick though. If that doesn’t work, you’ll need to understand the OAuth grant process. See this thread to understand all the steps you’d need to go through: [Showcase] Manual OAuth2 Token Integration
Let me know if you need more help