PromiseResolver.js

new Resolver({

   resolve: async () => {
     return new Promise((rs, rj) => {
        Model.find({ _id }, function(err, result){
          rs(result);
        });
     })
   }
   // or use await
   
   resolve: async () => {
      const result = await Model.find({ _id });
      return result;
   }
})