/**
 * If current user is logged-in, will return a JWT that can be used with Firebase services.
 */

[wp_root_url]/wp-json/fja/v1/getTokenWithCookie

/**
 * Use "fja_set_uid" filter hook to customise user's UID.
 */
add_filter("fja_set_uid", "prefix_custom_callback");

/**
 * Use "fja_set_custom_claims" filter hook to add custom claims.
 * @param  string  $user_id  The logged-in current user.
 */
add_filter("fja_set_custom_claims", "prefix_custom_callback");