public async Task<IActionResult> Index(
            [FromServices] MusicStoreContext dbContext,
            [FromServices] IMemoryCache cache)

public void Configure(IApplicationBuilder app)
{
    ...

    app.UseStaticFiles();
    
    app.UseAuthentication();

    app.UseSignalR(hubs =>
    {
        hubs.MapHub<ChatHub>("/chat");
    });

    app.UseMvc(routes =>
    {
        routes.MapRoute("default", "{controller=Home}/{action=Index}/{id?}");
    });
}

public void Configure(IApplicationBuilder app)
{
    ...

    app.UseStaticFiles();
    
    app.UseRouting();

    app.UseAuthentication();
    app.UseAuthorization();
    app.UseCors();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapHub<ChatHub>("/chat");
        endpoints.MapControllerRoute("default", "{controller=Home}/{action=Index}/{id?}");
    });
}

Endpoint xyz contains authorization metadata, but a middleware was not found that supports authorization.
Configure your application startup by adding app.UseAuthorization() inside the call to Configure(..) in the application startup code.

<PackageReference Include="Microsoft.EntityFrameworkCore.Design" 
                  Version="3.0.0-preview7.19362.6"
                  PrivateAssets="all" />

127.0.0.1 www.localhost