вот UserStore.js
import {makeAutoObservable} from "mobx";
export default class UserStore {
    constructor() {
        this._isAuth = false
        this._user = {}
        makeAutoObservable(this)
    }
    setIsAuth(bool) {
        this._isAuth = bool
    }
    setUser(user) {
        this._user = user
    }
    get isAuth() {
        return this._isAuth
    }
    get user() {
        return this._user
    }
}
и индекс из userApi
import axios from "axios";
const $host = axios.create({
    baseURL: process.env.REACT_APP_API_URL
})
const $authHost = axios.create({
    baseURL: process.env.REACT_APP_API_URL
})
const authInterceptor = config => {
    config.headers.authorization = `Bearer ${localStorage.getItem('token')}`
    return config
}
$authHost.interceptors.request.use(authInterceptor)
export {
    $host,
    $authHost
}