fix jsonserialization bug, app is now revived phew

Nexpo/Models/Notification.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Text.Json.Serialization;
 
 namespace Nexpo.Models
 {
@@ -10,6 +11,7 @@ public class Notification
         public DateTime? ScheduledTime { get; set; }
         public NotificationType NotificationType { get; set; }
         public int? EventId { get; set; }
+        [JsonIgnore]
         public ICollection<UserNotification> UserNotifications { get; set; }
     }
 }

Nexpo/Models/User.cs

@@ -38,6 +38,7 @@ public class User
 
         public string profilePictureUrl { get; set; }
 
+        [JsonIgnore]
         public ICollection<UserNotification> UserNotifications { get; set; }
         public Guid Uuid { get; set; } = Guid.NewGuid();
         public string ExpoPushToken { get; set; }

Nexpo/Models/UserNotification.cs

@@ -1,10 +1,17 @@
+using System.Text.Json.Serialization;
+
 namespace Nexpo.Models
 {
     public class UserNotification
     {
         public int UserId { get; set; }
+
+        [JsonIgnore]
         public User User { get; set; }
+
         public int NotificationId { get; set; }
+
+        [JsonIgnore]
         public Notification Notification { get; set; }
     }
 }

Nexpo/Startup.cs

@@ -38,14 +38,7 @@ public Startup(IConfiguration configuration, IWebHostEnvironment environment)
         public void ConfigureServices(IServiceCollection services)
         {
 
-            services.AddControllers()
-                .AddJsonOptions(options =>
-                {
-                    // Traps for circular references of json
-                    options.JsonSerializerOptions.ReferenceHandler = System.Text.Json.Serialization.ReferenceHandler.Preserve;
-                    options.JsonSerializerOptions.DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull;
-                    options.JsonSerializerOptions.MaxDepth = 64;
-                });
+            services.AddControllers();
 
             services.AddRouting(options =>
             {