answer with empty mongodb + vuejs array

Question

I am doing the front of a very silly application just to train,the backend is all done and running right tested several times with insomnia,so now on the front I can’t get the data in the database (Mongodb) always returns me an empty array in the answer.

Aqui vai o script vue

import Maquinas from '../services/maquinas'

export default {
    name: "home",
    data(){
        return {
        maquinas:[]   
        }
    }
,
   mounted(){
     Maquinas.listar().then(resposta => {
       console.log(resposta)})
    }
}

Here is my service that is calling the bank already with the Baseurl configured

import {http} from './config'

export default{

    async listar( ){
        const user_id = localStorage.getItem('user')
        const resposta = await http.get('/maquinas',
        {headers : {user_id}})
        console.log(resposta)
}

I’ve tried a lot but always returns the empty date