using App.Client.Services;
using App.Shared;
...

namespace App.Client
{
    public class Program
    {
        public static async Task Main(string[] args)
        {
            ...

            builder.Services.AddAuthorizationCore(options => options.AddAppPolicies());
            // 2 calls to AddApiAuthorization are necessary in 3.2-preview3
            // should be fixed in 3.2-preview4
            // https://github.com/dotnet/aspnetcore/issues/19854
            // https://github.com/dotnet/AspNetCore.Docs/issues/17649#issuecomment-612442543
            builder.Services.AddApiAuthorization();
            builder.Services.AddApiAuthorization(options =>
            {
                options.UserOptions.RoleClaim = "role";
            });

            ...
        }
    }
}