Provide Microsoft.AspNetCore.Authentication.Google package README (#57768)

Co-authored-by: Stephen Halter <halter73@gmail.com>

Author: 2 people

src/Security/Authentication/Google/src/Microsoft.AspNetCore.Authentication.Google.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Description>ASP.NET Core contains middleware to support Google's OpenId and OAuth 2.0 authentication workflows.</Description>
+    <Description>ASP.NET Core contains middleware to support Google's OAuth 2.0 authentication workflow.</Description>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;authentication;security</PackageTags>

src/Security/Authentication/Google/src/PACKAGE.md

@@ -0,0 +1,43 @@
+## About
+
+`Microsoft.AspNetCore.Authentication.Google` contains middleware to support Google's OAuth 2.0 authentication workflow.
+
+## How to Use
+
+To use `Microsoft.AspNetCore.Authentication.Google`, follow these steps:
+
+### Installation
+
+```shell
+dotnet add package Microsoft.AspNetCore.Authentication.Google
+```
+
+### Configuration
+
+1. Refer to the guide in the official documentation [here](https://learn.microsoft.com/aspnet/core/security/authentication/social/google-logins#create-the-google-oauth-20-client-id-and-secret) to configure the Google OAuth 2.0 client ID and secret
+2. Follow the steps in the official documentation [here](https://learn.microsoft.com/aspnet/core/security/authentication/social/google-logins#store-the-google-client-id-and-secret) to store the Google client ID and secret
+3. Add the Authentication service to your app's `Program.cs`:
+    ```csharp
+    var builder = WebApplication.CreateBuilder(args);
+
+    builder.Services.AddAuthentication().AddGoogle(googleOptions =>
+    {
+        googleOptions.ClientId = builder.Configuration["Authentication:Google:ClientId"];
+        googleOptions.ClientSecret = builder.Configuration["Authentication:Google:ClientSecret"];
+    });
+    ```
+
+## Main Types
+
+The main types provided by this package are:
+
+* `GoogleOptions`: Represents the options for configuring Google authentication
+* `GoogleHandler`: The authentication handler responsible for processing Google authentication requests and generating the appropriate authentication ticket
+
+## Additional Documentation
+
+For additional documentation and examples, refer to the [official documentation](https://learn.microsoft.com/aspnet/core/security/authentication/social/google-logins) on Google login setup in ASP.NET Core.
+
+## Feedback & Contributing
+
+`Microsoft.AspNetCore.Authentication.Google` is released as open-source under the [MIT license](https://licenses.nuget.org/MIT). Bug reports and contributions are welcome at [the GitHub repository](https://github.com/dotnet/aspnetcore).