我为用户制作了一个模型，如下所示:importVaporimportFluentimportFoundationfinalclassUser:Model{varid:Node?varusername:Stringvarname:Stringvarsurename:Stringvarpassword:Stringvarcredit:StringvarisBlocked:StringvarisAdmin:Stringinit(username:String,name:String,surename:String,password:String,credit:String,isBlocked