WordPress action rest_api_init hook to set a global variable for testing whether or not the user is logged in

global_is_user_logged_in.php

<?php
function global_is_user_logged_in()
{   
    global $iewp_crunchstats_logged_in;
    $is_user_logged_in = false;
    if ( is_user_logged_in() == true )
    {
        $is_user_logged_in = true;
    }
}
add_action( 'rest_api_init', 'global_is_user_logged_in' );