네이버로그인구현 소셜로그인 fields.forEach is not a function왜 fields.forEach is not a function의미 fields.forEach is not a function이유 is not a function 의미 fields.forEach is not a function오류 멀터 fields오류 멀터오류 fields 배열 TypeError: fields.forEach is not a function multer npm multer설명 multer란 멀터설명 멀터 morgan deprecated undefined format: specify a format morgan deprecated default format: use combined format이유 morgan deprecated default format: use combined format session resave false이유 session resave이유 session saveUninitialized false이유 session saveUninitialized 쓰는이유 session saveUninitialized 이유 session resave쓰는이유 session secret export const app = express();안됨 export const app = express(); export default app; mongoose.Schema new왜 mongoose.Schema new mongoose.Schema new붙이는 이유 mongoose.Schema new쓰는이유 mongoose.Schema new이유 express.urlencoded 이유 express.urlencoded쓰는이유 express.urlencoded의미 express.urlencoded TypeError: Cannot read properties of undefined db.on에러 db.on의미 db.once의미 db.once에러 db.on 에러 TypeError: The "listener" argument must be of type function. Received undefined throw new MongooseError('The `uri` parameter to `openUri()` must be a ' + got "undefined". Make sure the first parameter to `mongoose.connect()` or `mongoose.createConnection()` is a string. MongooseError: The `uri` parameter to `openUri()` must be a string mongodb useNewUrlParser쓰는이유 mongodb useNewUrlParser의미 useNewUrlParser의미 useNewUrlParser왜 useNewUrlParser useUnifiedTopology nodefetch 네이버 request nodefetch request 대신 node-fetch request 네이버소셜로그인node 네이버소셜로그인nodejs 네이버소셜로그인구현 네이버소셜로그인 node소셜로그인 소셜로그인 구현 npx npkill node_modules삭제 node modules삭제 node modue삭제 node-fetch 오류 Error [ERR_REQUIRE_ESM]: require() of ES Module 식별자나 문자열 또는 숫자가 필요합니다 jscript 컴파일오류 800A0404 소셜로그인오류 네이버소셜로그인오류 네이버소셜로그인구현오류 네이버로그인구현오류 개발자센터에 등록되지 않은 사이트에서 로그인을 시도했습니다 카카오로그인구현원리 카카오로그인구현 소셜로그인원리 소셜로그인구현 소셜로그인node Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client Error [ERR_HTTP_HEADERS_SENT] Cannot set headers after they are sent to the client index.js 내용 const express = require("express") promisePool.query() promisePool.query mysql2 results mysql2 mysql rows connection.query() connection.query package.json설명 javascript index.js index.js npmmysql mySQL intaller ER_NOT_SUPPORTED_AUTH_MODE Client does not support authentication npminit npm init npm install package.json 네이버로그인 session