Improve user creation docs

- Remove 3 unnecessary screenshots.
- Add "Prerequisites" to several tasks, as per our task topic convention.
- Split out all tasks into separate bullet points.
- Complete the steps of the "Create users in Admin Area" task.

doc/user/profile/account/create_accounts.md

@@ -9,32 +9,35 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 You can create users:
 
-- Manually through the sign in page or Administrator Area.
-- Automatically through user authentication integrations.
+- [Manually through the sign-in page](#create-users-on-sign-in-page).
+- [Manually in the Admin Area](#create-users-in-admin-area).
+- [Manually using the API](../../../api/users.md).
+- [Automatically through user authentication integrations](#create-users-through-authentication-integrations).
 
-## Create users on sign in page
+## Create users on sign-in page
 
-If you have [sign-up enabled](../../admin_area/settings/sign_up_restrictions.md), users can create
-their own accounts by either:
+Prerequisites:
 
-- Selecting the **Register now** link on the sign-in page.
-- Navigating to `https://gitlab.example.com/users/sign_up`.
+- [Sign-up enabled](../../admin_area/settings/sign_up_restrictions.md)
+
+Users can create their own accounts by either:
 
-![Register Tab](img/register_v13_6.png)
+- Selecting the **Register now** link on the sign-in page.
+- Navigating to your GitLab instance's sign-up link. For example: `https://gitlab.example.com/users/sign_up`.
 
 ## Create users in Admin Area
 
-As an Administrator user, you can manually create users:
+Prerequisites:
+
+- You must have administrator access for the instance.
+
+To create a user manually:
 
 1. On the top bar, select **Menu > Admin**.
 1. On the left sidebar, select **Overview > Users** (`/admin/users`).
 1. Select **New user**.
-
-You can also [create users through the API](../../../api/users.md) as an administrator.
-
-![Administrator User Button](img/admin_user_button.png)
-
-![Administrator User Form](img/admin_user_form.png)
+1. Complete the fields.
+1. Select **Create user**.
 
 ## Create users through authentication integrations