SharePoint authentication via console app C# Visual Studio

[Adm666]

I'm trying to authenticate to Sharepoint site i've made (it has a list with 2 items in it),
i need to print its title to the console - really simple approach.
with OfficeDevPnp.Core Nuget installed i tried the AppOnly following code:

public static void AppOnlyAuthCall()
        {
            using (var clientContext = new AuthenticationManager().GetAppOnlyAuthenticatedContext(siteUrl, clientId, clientSecret))
            {
                clientContext.Load(clientContext.Web, page => page.Title);
                clientContext.ExecuteQuery();
                Console.WriteLine(clientContext.Web.Title);
            };
        }

and it gives me an error:
Microsoft.IdentityModel.SecurityTokenService.RequestFailedException: 'Token request failed.'
WebException: The remote server returned an error: (401) Unauthorized.

Even though i did create API Permissions to sharepoint (read with no admin consent required),
giving permission through "appregnew.aspx"
what am i missing?

If anyone could refer me to an UP TO DATE and Actually Working guide on how to authenticate to sharepoint programmatically (C#) it'll be awesome

[pritaeas]

Are you looking for this perhaps?

https://docs.microsoft.com/en-us/graph/api/resources/sharepoint?view=graph-rest-1.0