//Change password admin in terminal
UPDATE admin_user SET `password` = CONCAT(SHA2('xxxxxxxxYOUR_NEW_PASSWORD', 256), ':xxxxxxxx:1') WHERE `username` = 'YOUR_ADMIN_USERNAME';

//Unlock account in terminal
php bin/magento admin:user:unlock <username>

//Add administrator in terminal
sudo php bin/magento admin:user:create --admin-user="mnuhell" --admin-password="**password**" --admin-email="m.villagordovera@gmail.com" --admin-firstname="Manuel" --admin-lastname="Villagordo"