我无法从nodejs.连接到mysql。我收到以下错误

/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/Parser.js:80
        throw err; // Rethrow non-MySQL errors
        ^

Error: ER_ACCESS_DENIED_ERROR: Access denied for user ''@'localhost' (using password: YES)
    at Handshake.Sequence._packetToError (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/sequences/Sequence.js:52:14)
    at Handshake.ErrorPacket (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/sequences/Handshake.js:130:18)
    at Protocol._parsePacket (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/Protocol.js:279:23)
    at Parser.write (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/Parser.js:76:12)
    at Protocol.write (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/Protocol.js:39:16)
    at Socket.<anonymous> (/home/gayathri/jsonhbs/node_modules/mysql/lib/Connection.js:103:28)
    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 Protocol._enqueue (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/Protocol.js:145:48)
    at Protocol.handshake (/home/gayathri/jsonhbs/node_modules/mysql/lib/protocol/Protocol.js:52:23)
    at Connection.connect (/home/gayathri/jsonhbs/node_modules/mysql/lib/Connection.js:130:18)
    at Object.<anonymous> (/home/gayathri/jsonhbs/db1.js:8:12)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
/home/gayathri/jsonhbs/node_modules/mysql/lib/p