Many directory and listing sites need to allow people to sign-up, so that they can create and edit content.
Front-end registration forms will allow people to sign-up as members to your directory.
Once members are signed-up to your directory, they need a page to manage their content.
Learn how to allow members to manage their directory items from their "my account" page.
WordPress offers a very basic login page. Learn how to create custom login pages that match the look of your directory site.
Learn how to create a custom "lost password" page that matches the design of your directory.
Members of your directory will often want to edit their own profile. Learn how to do this with Toolset Forms.
To be able to create custom searches and relationships for users registered on your site, you need to connect them to custom posts.