Potential fix for option saving

Core/Extensions/DbContextExtension.cs

@@ -37,4 +37,18 @@ public static class DbContextExtension
 
         entry.State = EntityState.Modified;            
     }
+
+    public static void AddOrUpdate(this DbContext dbContext, object entity)
+    {
+        try
+        {
+            dbContext.Update(entity);
+            dbContext.SaveChanges();
+        }
+        catch (DbUpdateConcurrencyException e)
+        {
+            dbContext.Add(entity);
+            dbContext.SaveChanges();
+        }
+    }
 }

Core/GeneralHandler.cs

@@ -71,8 +71,7 @@ namespace Kruzya.TelegramBot.Core
             await databaseContext.Users.AddAsync(new BotUser()
             {
                 ChatId = chat,
-                UserId = user,
-                BotUserId = new Guid()
+                UserId = user
             });
         }
     }