当我尝试使用node（npm start）启动代码时出错。 我安装了MySQL，XAMPP和节点。 错误如下：
webpack building...
Server started on port 3000
/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/Parser.js:80
throw err; // Rethrow non-MySQL errors
^
Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'root'@'localhost' (using password: NO)
at Handshake.Sequence._packetToError (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/sequences/Sequence.js:52:14)
at Handshake.ErrorPacket (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/sequences/Handshake.js:103:18)
at Protocol._parsePacket (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/Protocol.js:279:23)
at Parser.write (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/Parser.js:76:12)
at Protocol.write (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/Protocol.js:39:16)
at Socket.<anonymous> (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/Connection.js:103:28)
at emitOne (events.js:115:13)
at Socket.emit (events.js:210:7)
at addChunk (_stream_readable.js:266:12)
at readableAddChunk (_stream_readable.js:253:11)
at Socket.Readable.push (_stream_readable.js:211:10)
at TCP.onread (net.js:585:20)
--------------------
at Protocol._enqueue (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/Protocol.js:145:48)
at Protocol.handshake (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/protocol/Protocol.js:52:23)
at PoolConnection.connect (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/Connection.js:130:18)
at Pool.getConnection (/Users/RaphaelleG/Documents/SOEN343/node_modules/mysql/lib/Pool.js:48:16)
at Object.<anonymous> (/Users/RaphaelleG/Documents/SOEN343/server/config/database.js:14:6)
at Module._compile (module.js:624:30)
at Object.Module._extensions..js (module.js:635:10)
at Module.load (module.js:545:32)
at tryModuleLoad (module.js:508:12)
at Function.Module._load (module.js:500:3)
at Module.require (module.js:568:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/Users/RaphaelleG/Documents/SOEN343/server/app.js:18:16)
at Module._compile (module.js:624:30)
at Object.Module._extensions..js (module.js:635:10)
at Module.load (module.js:545:32)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! tecmarket@0.1.0 start: `node ./server/app.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the tecmarket@0.1.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/RaphaelleG/.npm/_logs/2017-09-22T03_16_49_509Z-debug.log
请你能帮我解决这个错误吗？