Implement Sharepoint 2019 Online Oauth2.0 authorization

Hi,

I an trying to implement oauth2.0 authorization via c# for sharepoint, but I have not found any documentation.

How to do it properly ? I have created App register in Azure Active Directory, but I do not know how to define connection parameters such as auth url, redirect url, scope.

Please provide documentation or description which steps should be done with samples of code

Thanks in advance