已經給了遠程連接權限（update mysql.user set host = "%" where user = 'root'; flush privileges;）
連接錯誤提示：
Error: 1251 - Client does not support authentication protocol requested by server; consider upgrading MySQL client
解決方案：執行以下sql
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密碼'