In the file wp-config.php in your web-root folder, you should not forget to change your access keys/salts to something unique.
After install, WordPress generates this file, but the salt keys are not present yet.
Looks like:
define( ‘AUTH_KEY’, ‘put your unique phrase here’ );
define( ‘AUTH_KEY’, ‘put your unique phrase here’ );
define( ‘SECURE_AUTH_KEY’, ‘put your unique phrase here’ );
define( ‘LOGGED_IN_KEY’, ‘put your unique phrase here’ );
define( ‘NONCE_KEY’, ‘put your unique phrase here’ );
define( ‘AUTH_SALT’, ‘put your unique phrase here’ );
define( ‘SECURE_AUTH_SALT’, ‘put your unique phrase here’ );
define( ‘LOGGED_IN_SALT’, ‘put your unique phrase here’ );
define( ‘NONCE_SALT’, ‘put your unique phrase here’ );
There is a handy little site offer free hash generation and also auto-creates the WordPress variables so copy/paste is dead simple.
Here is the site:
https://md5.me/wordpress-secret-key-generator.php
Don’t share these keys with anyone you don’t trust!