[feature] Format the code and improve Mini Program authorization to o… (#473)

* [feature] Format the code and improve Mini Program authorization to obtain openid（miniprogram/auth/auth.go Code2Session）

* [feature] CheckEncryptedData (https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/user-info/auth.checkEncryptedData.html)

* upgrade json error

* upgrade json error

Co-authored-by: houseme <houseme@outlook.com>

officialaccount/user/user.go

@@ -15,19 +15,19 @@ const (
 	userListURL     = "https://api.weixin.qq.com/cgi-bin/user/get"
 )
 
-//User 用户管理
+// User 用户管理
 type User struct {
 	*context.Context
 }
 
-//NewUser 实例化
+// NewUser 实例化
 func NewUser(context *context.Context) *User {
 	user := new(User)
 	user.Context = context
 	return user
 }
 
-//Info 用户基本信息
+// Info 用户基本信息
 type Info struct {
 	util.CommonError
 
@@ -62,7 +62,7 @@ type OpenidList struct {
 	NextOpenID string `json:"next_openid"`
 }
 
-//GetUserInfo 获取用户基本信息
+// GetUserInfo 获取用户基本信息
 func (user *User) GetUserInfo(openID string) (userInfo *Info, err error) {
 	var accessToken string
 	accessToken, err = user.GetAccessToken()