Microsoft Outlook connection using Graph #12032

Hi,

I'm trying to implement the ability to read Outlook emails in my application (https://learn.microsoft.com/en-us/training/modules/msgraph-dotnet-core-show-user-emails/1-introduction), but I'm facing a problem because Graph needs to launch the services services // Add support for OpenId authentication .AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme) failed

because an OpendConnectId Schema already exists

I think This code causes issue in Startup.cs

services // 2. Add support for OpenId authentication

.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)

.AddMicrosoftIdentityWebApp(Configuration)

How to fix this problem THANKS