I want to generate simple Post Method. I know about client_id and client_secret, However, I don't know about Scope parameter, which is present in the body.
Detailed Picture:
Scope Parameter here is A comma or space separated list of Permissions to request from the person using your app. It is used in OAuth 2.0 Specification. For example in facebook you can see permission set in https://developers.facebook.com/docs/facebook-login/permissions/#basic-permissions
So your example can be like https://graph.facebook.com/oauth/authorize?
client_id=123456789
&redirect_uri=http://example.com/
&scope=publish_stream,share_item,offline_access,manage_pages