nginx设置phpmyadmin别名

I installed Nginx, php7 fpm, and phpmyadmin using brew.

I can not set up an alias for phpmyadmin. I want something like localhost/phpmyadmin

My config file:

location /phpmyadmin {
  index index.php index.htm;
  alias /usr/local/Cellar/phpmyadmin/4.6.1/share/phpmyadmin;
}

I'm getting 403 Forbidden error when I try to access the url