I'm using json-server (version 1.0.0-beta.3) my id is not being generated automatically

I'm using json-server as a fake api, and when making the POST request, my ids are not being generated automatically, note that they are already as a String, which is as recommended in the documentation.

My class user

export class User {
public id: String = ''
public name: String = ''
public phone: String = ''
public email: String = ''
public cpf: String = ''
public password: String = ''
}


my class in which I assign the form data to user and my method that accesses the post in the service

onSubmit(): void {

if(this.addressForm.controls['name'].value)
this.user.name = this.addressForm.controls['name'].value

if(this.addressForm.controls['email'].value)
this.user.email = this.addressForm.controls['email'].value

if(this.addressForm.controls['phone'].value)
this.user.phone = this.addressForm.controls['phone'].value

if(this.addressForm.controls['cpf'].value)
this.user.cpf = this.addressForm.controls['cpf'].value

if(this.addressForm.controls['password'].value)
this.user.password = this.addressForm.controls['password'].value

console.log(this.user)


this.service.addUser(this.user).subscribe({
next: (response) => {
console.log(response)
alert('Dado registrado com sucesso')
},
error: (erro: any) => { // error -> Tratamento de exceção do subscribe
console.log(erro)
alert('Ocorreu algum erro')
}
})
}


from 10 to 13 I manually put the data in my db.json, after that we can notice that the id is not coming automatically

{
"id": "10",
"firstName": "Bruno",
"email": "brunohauck@gmail.com",
"phone": "323",
"cpf": "05126769685",
"password": "fdsfds"
},
{
"id": "11",
"firstName": "Bruno",
"email": "brunohauck@gmail.com",
"phone": "323",
"cpf": "05126769685",
"password": "fdsfds"
},
{
"id": "12",
"firstName": "Bruno",
"email": "brunohauck@gmail.com",
"phone": "323",
"cpf": "05126769685",
"password": "fdsfds"
},
{
"id": "13",
"firstName": "Bruno",
"email": "brunohauck@gmail.com",
"phone": "323",
"cpf": "05126769685",
"password": "fdsfds"
},
{
"id": "",
"name": "teste",
"phone": "1111111111",
"email": "teste@gmail.com",
"cpf": "18361591885",
"password": "111"
}
]

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