결과값을 res.json 해주는 코드 추가

 var user=require("../user/userinfo")
 var express = require('express');
+const search = require("../api/api");
 var app = express.Router();
 app.get('/', function(req, res) {
   res.render('main', { title: 'R U TROLL?' });
 });
 
-app.get('/search/:username/', function(req, res){
-  var name=req.params.username
-  user.userInfo(name)  
+app.get('/api/search/:username/', function(req, res){
+  var name=req.params.username;
+  user.userInfo(name,function(result){
+      console.log(result);
+      res.json(result);
+  });
 });
 
 module.exports=app;
\ No newline at end of file