Implement OAUTH2.0 SSO for ASP.NET C# VS2022 for Google, Microsoft (Entra) and Keycloack — 2

I need to integrate Google, Microsoft and Keycloack authentication into my ASP.NET WebForms application for Single Sign-On (SSO) purposes with OAUTH 2.0.. The implementation is probably straightforward,… (Budget: $30 – $250 USD, Jobs: .NET, ASP.NET, C# Programming, Keycloak, OAuth)