请求接口code换取openid信息：

wxlogin() {let that = thislet token = uni.getStorageSync('weToken')console.log(token)if (token) {wx.reLaunch({url: "/pages/tarbar"})} else {uni.login({provider: 'weixin', //使用微信登录success: function(res) {const code = res.code//获取默认微信信息uni.request({url: '', //换取key。data: {code: code,},method: "POST",success: (res) => {console.log(res.data.data)uni.setStorageSync('session_key', res.data.data)const openid=res.data.data.openid;that.registration(openid)}});  }});}},

存储用户到数据库：

registration(data) {console.log(data)uni.getUserInfo({success(res) {