MYSQL：ER_NOT_SUPPORTED_AUTH_MODE:Client does not support authentication protocol

Error: ER_BAD_DB_ERROR: Unknown database 'user'
    at Handshake.Sequence._packetToError (/Users/apple/Desktop/githubdoc/node/server/node_modules/mysql/lib/protocol/sequences/Sequence.js:47:14)
.....

node使用mysql報錯。

原因：登錄數據庫的客戶端跟mysql8.0不兼容了，mysql8.0密碼認證采用了新的密碼格式

解決辦法：

　　在系統mysql終端輸入下面命令

//password 是你的數據庫賬戶密碼，root和host也是
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';