Simply create new account directly in WordPress database. If you have access to WordPress database running on MySQL but not to WordPress admin you can “hack” it.
Script source: https://www.hostpapa.ca/knowledgebase/create-admin-account-wordpress-via-mysql/
INSERT INTO `wp_users` (`user_login`, `user_pass`, `user_nicename`, `user_email`, `user_status`)
VALUES ('rybnitom', MD5('Pa$$w0rd'), 'Tomas Rybnicky', 'tomas.rybnicky@wetory.com', '0');
INSERT INTO `wp_usermeta` (`umeta_id`, `user_id`, `meta_key`, `meta_value`)
VALUES (NULL, (Select max(id) FROM wp_users), 'wp_capabilities', 'a:1:{s:13:"administrator";s:1:"1";}');
INSERT INTO `wp_usermeta` (`umeta_id`, `user_id`, `meta_key`, `meta_value`)
VALUES (NULL, (Select max(id) FROM wp_users), 'wp_user_level', '10');