brew mysql已安装，但我无法在Mac上访问

Question

我在启动和运行mysql OSX时遇到严重问题。 我安装了自制软件，php和mysql。

当我运行Brew服务列表时，会看到以下内容：

Name      Status  User   Plist
dnsmasq   started root   /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
mysql@5.7 started sidney /Users/sidney/Library/LaunchAgents/homebrew.mxcl.mysql@5.7.plist
nginx     started root   /Library/LaunchDaemons/homebrew.mxcl.nginx.plist
php       started root   /Library/LaunchDaemons/homebrew.mxcl.php.plist

但是一旦我尝试：

mysql -uroot
mysql -u root -p

他们都给我以下错误：

ERROR 1698 (28000): Access denied for user 'root'@'localhost'

我也尝试过：

mysql_secure_installation

但是我看到以下输入密码的过程：

Securing the MySQL server deployment.
Enter password for user root:
Error: Access denied for user 'root'@'localhost'

如何在Mac上修复mysql？