How can I submit only form elements?

I have a form page and I use it for both create and update

My form fields are like this;

myForm: {
name: (...)
email: (...)
password: (...)
}

I can successfully submit a request.
When we come to the update process, I get the data in this way (this.myForm = response.data)
When I send an update request I just want the form fields to go but it goes like this

myForm: {
name: (...)
email: (...)
password: (...)
createdAt: (...)
updatedAt: (...)
_id: (...)
}

I don't want to send createdAt, updatedAt, _id fields
How can I submit only form fields in Element-ui? (I am using Vue.js)
Is there something like this.$refs.myForm.fields or this.$refs.myForm.values I couldn't find it