Able to create and read data from the DB

Models/User.cs

@@ -2,6 +2,7 @@ using System;
 
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
 namespace TextSender_API.Models;
@@ -9,8 +10,9 @@ namespace TextSender_API.Models;
 public class User
 {
 #region Properties
-    // [BsonElement("_id")]
-    public ObjectId Id { get; set; }
+    [BsonId]
+    [BsonRepresentation(BsonType.ObjectId)]
+    public string? Id { get; set; }
     [BsonElement("firstname")]
     public string? Firstname { get; set; }
     [BsonElement("lastname")]