从函数获取数据并保存在mongodb时出错

Question

我有一个从mysql服务器获取到期日期的功能，并将该日期与其他信息一起保存在mongodb上， 但是运行后，除日期外所有内容都会保存。

功能：

const sql = "SELECT expiry from membri where pass =  '" + license + "'"
           function expiry(license, callback, results){
           con.query(sql, results)
           if (results) {
           callback(results[0].expiry)
           }
           }

保存数据

const newUser = new User({
                            userKey: license,
                            authenicated: true,
                            discordUserID: discordUserID,
                            currentDate: new Date(),
                            expiredDate: new expiry(license)
                              });
                             console.log(new Date())
                          // save user
                           newUser
                            .save()
                            .then(() => {
                              const member = guild.member(msg.author);
                              if (member) {
                                // after successfully authenicated, give user role => access for only 30 days
                                member.addRole(memberRoleID);

                                const successEmbed = new Discord.RichEmbed()
                                  .setAuthor("Authentication Bot ( SUCCESS )")
                                  .setColor("#9b42f4")
                                  .addField(
                                    "Activated: ",
                                    `${license} :white_check_mark:`
                                  );

                                return msg.author.send(successEmbed);
                              }
                            })

                             [...]

感谢帮助！