How to set up an incoming link when configuring OAuth 2.0?

[WeiMiao]

I'm trying to configure some programmatic API to connect to my Confluence domain through OAuth 2.0. It seems that I need a client_id and a token. However, when I'm following [this guide](https://developer.atlassian.com/server/confluence/confluence-oauth2-provider-api/) of OAuth 2.0 setup, I'm asked to create an "incoming link" and set up its scope as a prerequisite. I tried to follow the guide but was not able to find any place to set up the scope. Moreover, I'm confused by the URL that I need to provide to the incoming link. What URL should I provide here? Why do I have to set up this incoming link for OAuth 2.0?

All I would like to do is to call some open-source library and connect to my Confluence domain. Can anyone offer some help here? Thanks!

[WeiMiao]

Can anyone provide some help? My biggest blocker is that I was not able to see the link of setting up scope and API token after creating the incoming link.