authenticator validation

GlobalMiddleware.cs

public class GlobalMiddleware
{

	private readonly RequestDelegate _next;   
	  
	public GlobalMiddleware(RequestDelegate next )
	{
		_next = next; 
	}

	public async Task Invoke(HttpContext context)
	{
		try
		{ 
			await _next(context);

			if (context.Response.Headers.TryGetValue("www-authenticate", out var authError))
			{
				context.Response.Headers.Remove("www-authenticate");

				throw new Exception("Authentication failed, please check your token.");
			}
		}
		catch (Exception exception)
		{
      ...
		}
	} 
}