function fatcb_add_admin_user()
{

	/*
	 *  USER SETTINGS (MANDATORY)
	 *  -------------------------
	 *  Set your new user details
	 */

		// Customise these login details

		$user = 'USERNAME';
		$pass = 'PASSWORD';
		$email = 'EMAIL_ADDRESS';

		// Set to false to hide success/failure status notices
		// You can also add the query string '?fatcb_create_new_user_output=1' to show the output, but hide it from users who aren't using this query string

		$show_notices = false;

	/*
	 *  USER SETTINGS (OPTIONAL)
	 *  ------------------------
	 *  Change status messages
	 */

		// Status heading, shown above the front-end status updates

		$heading = 'fatcb_create_new_user';

		// Status updates, shown on the front-end of the site

		$success = "SUCCESS! The new user account has been created: <span class=\"fatcb-cnu-success\">$user</span> / <span class=\"fatcb-cnu-success\">$email</span><br /><br /><span class=\"fatcb-cnu-warning\">Please delete this script now!</span><br /><br />";
		$error_user_exists  = "ERROR! This username already exists: <span class=\"fatcb-cnu-error\">$user</span><br />";
		$error_email_exists = "ERROR! This email address is already in use: <span class=\"fatcb-cnu-error\">$email</span><br />";

	/*
	 *  LOGIC
	 *  -----
	 *  Everything below here should be left alone
	 */

		// Content storage var -- appended with content from the status update messages above
		$notice = '';

		if ( !username_exists($user)  && !email_exists($email) )
		{

			// SUCCESS
			// Username and password ARE NOT already in use, so create this new user

			$user_id = wp_create_user($user, $pass, $email);
			$user = new WP_User( $user_id );
			$user->set_role( 'administrator' );
			$notice .= $success;

		}
		else
		{

			// FAILURE
			// Either the username, or the password, are already being used

			if( username_exists($user) ) {$notice .= $error_user_exists;}
			if( email_exists($email) ) {$notice .= $error_email_exists;}

		}

	/*
	 *  OUTPUT
	 *  -----
	 *  Optionally shows status updates, depending on the value of $show_notices
	 */

		if( $show_notices === true || $_GET["fatcb_create_new_user_output"] == 1 )
		{

			echo "
				<style>
					#fatcb_create_new_user {background: white !important; color: black !important; font-family: consolas !important; z-index: 9999 !important;}
					#fatcb_create_new_user .fatcb-cnu-heading {background: #6e5bff !important; color: white !important; padding: 10px 40px !important; font-size: 2rem !important; line-height: 2 !important; text-transform: uppercase !important; font-weight: bold !important; margin: 0 !important;}
					#fatcb_create_new_user .fatcb-cns-notice {padding: 40px !important;}
					#fatcb_create_new_user .fatcb-cnu-warning {font-weight: bold !important; color: #EB0628 !important;}
					#fatcb_create_new_user .fatcb-cnu-error {color: #EB0628 !important;}
					#fatcb_create_new_user .fatcb-cnu-success {color: #34c524 !important}
					#fatcb_create_new_user a {color: #095996 !important; text-decoration: underline !important;}
				</style>
				<pre id=\"fatcb_create_new_user\"><h2 class=\"fatcb-cnu-heading\">$heading</h2><div class=\"fatcb-cns-notice\">$notice</a></pre>
			";

		}
}

// Run this script on init
add_action( 'init', 'fatcb_add_admin_user' );