The main objective of this article is: Implementing Google Authentication Install Google Authentication NuGet Package: Let's install the package required for google authentication. Visual Studio 2022: Install-Package Microsoft.AspNetCore.Authentication.Google -Version 7.0.3 Visual Studio Code: dotnet add package Microsoft.AspNetCore.Authentication.Google --version 7.0.3 Register With Google: We need to register our Razor Page application with Google to enable Google authentication. So following are the registration steps with Google. (Step 1) Go to Google API & Service could console at "https://console.cloud.google.com/projectselector2/apis/dashboard?supportedpurview=project" (Step 2) Click on the 'Create Project' button. (Step 3) Give a project name and then click on the 'Create' button. (Step 4) On creating a project successfully, we can observe it as a selected project in our dashboard like below. (Step 5) Select 'OAuth Consent Screen' l