DefaultModel CreatedAt and UpdatedAt fields saving wrong time on native methods

[Elcomerz]

Describe the bug

To Reproduce
Steps to reproduce the behaviour:

1. Declare a model with DefaultModel
   type Book struct {
   // DefaultModel add _id,created_at and updated_at fields to the Model
   mgm.DefaultModel bson:",inline"
   Name string json:"name" bson:"name"
   Pages int json:"pages" bson:"pages"
   }

2. Insert a document to the DB using this model with Collection.InsertOne or Collection.InsertMany functions

3 Check created_at value of the inserted document

4.Its written as 0001-01-01T00:00:00.000+00:00

Expected behaviour
It should actually write 2020-06-12T05:45:56.598+00:00

Environment (please complete the following information):

• OS: [ubuntu 18.04]

[mehran-prs]

Mongo Go Models does not support webhook call on all of the collection methods.
Check mgm docs in README.md file please:

collection's methods which call to the hooks:
Create & CreateWithCtx
Update & UpdateWithCtx
Delete & DeleteWithCtx