uniapp怎么修改默认请求方式

function request(url, method, data) {
  return new Promise((resolve, reject) => {
    uni.request({
      url: url,
      method: method,
      data: data,
      header: {
        'content-type': 'application/JSON'
      },
      success: res => {
        resolve(res.data)
      },
      fail: err => {
        reject(err)
      }
    })
  })
}

request('Http://example.com/api/user', 'POST', {username: 'admin', passWord: '123456'})
  .then(res => {
    console.log(res)
  })
  .catch(err => {
    console.error(err)
  })

let token = 'eyJhbGCiOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRjsMeKKF2Qt4fwpMeJf36POk6yJV_adQssw5c'

uni.request({
  url: 'http://example.com/api',
  method: 'GET',
  header: {
    'Authorization': 'Bearer ' + token
  },
  success: res => {
    console.log(res.data)
  },
  fail: err => {
    console.error(err)
  }
})

import Vue from 'vue'
import App from './App'

Vue.config.productionTip = false

Vue.prototype.$https = uni.request
const baseUrl = 'http://example.com/api'

uni.$https.defaults.baseURL = baseUrl
uni.$https.defaults.header = {
  'content-type': 'application/json'
}

App.mpType = 'app'

const app = new Vue({
  ...App
})
app.$mount()