從源“http://localhost:8080”訪問“https://identitytoolkit.googleapis.com/v1/accounts:/signUp?key=AIzaSyDvZN5PKdB_b9jX-5rA-t9e3KSxJ-qtkdU”處的 XMLHttpRequest 已被 CORS 策略阻止：對預檢請求的響應未通過訪問控制檢查：無“Access-Control-Allow-Origin”我嘗試在 vue.js 中使用 Axios 在 firebase 中創建新用戶，但出現上述錯誤。這是我的代碼示例。onSubmit () {    const formData = {      email: this.email,      age: this.age,      password: this.password,      confirmPassword: this.confirmPassword,      country: this.country,      hobbies: this.hobbyInputs.map(hobby => hobby.value),      terms: this.terms    }    console.log(formData)    axios.post('signUp?key=AIzaSyDvZN5PKdB_b9jX-5rA-t9e3KSxJ-qtkdU', {      email: formData.email,      password: formData.password,      returnSecureToken: true,    })    .then((res) => {        console.log(res)    })    .catch((error) => {      console.log(error)    })  }這是我的默認 axios 實例代碼。import axios from 'axios'const instance = axios.create({    baseURL: 'https://identitytoolkit.googleapis.com/v1/accounts:'});instance.defaults.headers.common['Access-Control-Allow-Headers'] = 'X-Requested-With, content-type';instance.defaults.headers.common['Access-Control-Allow-Origin'] = 'X-Requested-With, content-type';export default instance;