WordPress (WordPress.org) is a free and open-source content management system (CMS) based on PHP & MySQL. Features include a plugin architecture and a template system. It is most associated with blogging but supports other types of web content including more traditional mailing lists and forums, media galleries, and online stores. Used by more than 60 million websites, including 30.6% of the top 10 million websites as of April 2018, WordPress is the most popular website management system in use. WordPress has also been used for other application domains such as pervasive display systems (PDS).
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....
Almost everybody who is working with WordPress on higher level, and is using it behind borders of simple blogging website system definitely knows plugin Advanced Custom Fields (ACF in following...