public async Task<IActionResult> SendNotification([FromBody] NotificationRequest request)
    {
        // Validate the request
        if (string.IsNullOrEmpty(request.Token) || string.IsNullOrEmpty(request.Title) || string.IsNullOrEmpty(request.Body))
        {
            return BadRequest("Invalid request.");
        }

        try
        {
            // Create a message to send
            var message = new Message()
            {
                Token = request.Token,
                Notification = new Notification()
                {
                    Title = request.Title,
                    Body = request.Body
                }
            };

            // Send the message
            string response = await FirebaseMessaging.DefaultInstance.SendAsync(message);

            // Return the response
            return Ok(new { messageId = response });
        }
        catch (FirebaseMessagingException ex)
        {
            // Handle errors related to Firebase Messaging
            return StatusCode(500, new
            {
                error = ex.Message,
                status = ex.HttpResponse.StatusCode,
                response = await ex.HttpResponse.Content.ReadAsStringAsync()
            });
        }
    }

    public class NotificationRequest
    {
        public string Token { get; set; }
        public string Title { get; set; }
        public string Body { get; set; }
    }

that is my code but always have firebase messaging exception if anyone have firebase push notification video tutorial for .net core version 8 web api please send i am totally frusted now

firebase push notification for check by swagger