权限问题

{ Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'root'@'localhost' (using password: YES)
    at Handshake.Sequence._packetToError (D:\Node\node_modules\mysql\lib\protocol\sequences\Sequence.js:32:14)
    at Handshake.ErrorPacket (D:\Node\node_modules\mysql\lib\protocol\sequences\Handshake.js:62:18)
    at Protocol._parsePacket (D:\Node\node_modules\mysql\lib\protocol\Protocol.js:169:24)
    at Parser.write (D:\Node\node_modules\mysql\lib\protocol\Parser.js:62:12)
    at Protocol.write (D:\Node\node_modules\mysql\lib\protocol\Protocol.js:36:16)
    at Socket.ondata (_stream_readable.js:555:20)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at readableAddChunk (_stream_readable.js:176:18)
    at Socket.Readable.push (_stream_readable.js:134:10)
    --------------------
    at Handshake.Sequence (D:\Node\node_modules\mysql\lib\protocol\sequences\Sequence.js:15:21)
    at new Handshake (D:\Node\node_modules\mysql\lib\protocol\sequences\Handshake.js:9:12)
    at Protocol.handshake (D:\Node\node_modules\mysql\lib\protocol\Protocol.js:41:50)
    at Connection.connect (D:\Node\node_modules\mysql\lib\Connection.js:63:18)
    at Connection._implyConnect (D:\Node\node_modules\mysql\lib\Connection.js:162:10)
    at Connection.query (D:\Node\node_modules\mysql\lib\Connection.js:88:8)
    at Server. (D:\Node\server.js:40:20)
    at emitTwo (events.js:106:13)
    at Server.emit (events.js:191:7)
    at HTTPParser.parserOnIncoming [as onIncoming] (_http_server.js:546:12) code: 'ER_ACCESS_DENIED_ERROR', fatal: true }

• 网上搜索了很多说是root权限问题改root密码，问题还是没有解决，本人前段一枚对node后台不是很懂，求大神帮忙解决下。