Learn how to implement sign-out functionality in client applications and secure your IdentityServer4 with certificates in this ASP.NET Core 3 tutorial. Explore the process of creating and integrating certificates into your identity server for enhanced security. Gain hands-on experience with practical demonstrations and access additional resources, including a related blog post on using PowerShell with certificates. Follow along with the provided source code to implement these crucial authentication features in your ASP.NET Core 3 projects.