}
}
+// TODO: adapt
+//exports.cleanUsersDb = function()
+//{
+// var tsNow = new Date().getTime();
+// // 86400000 = 24 hours in milliseconds
+// var day = 86400000;
+//
+// db.users.find({}, (err,userArray) => {
+// userArray.forEach( u => {
+// if ((u.sessionTokens.length==0 &&
+// u._id.getTimestamp().getTime() + day < tsNow) //unlogged
+// || u.updated + 365*day < tsNow) //inactive for one year
+// {
+// db.users.remove({"_id": u._id});
+// }
+// });
+// });
+//}
+
module.exports = UserModel;