bp_ps_learndash_get_users_for_course( int $course_id, array $query_args = array(), bool $exclude_admin = true )

function bp_ps_learndash_get_users_for_course( $course_id = 0, $query_args = array(), $exclude_admin = true ) {
	$course_user_ids = array();

	if ( empty( $course_id ) ) {
		return $course_user_ids;
	}

	$defaults = array(
		// By default WP_User_Query will return ALL users. Strange.
		'fields' => 'ID',
	);

	$query_args = wp_parse_args( $query_args, $defaults );

	if ( $exclude_admin == true ) {
		$query_args['role__not_in'] = array( 'administrator' );
	}

	$course_access_list = get_course_meta_setting( $course_id, 'course_access_list' );
	$course_user_ids    = array_merge( $course_user_ids, $course_access_list );

	$course_access_users = get_course_users_access_from_meta( $course_id );
	$course_user_ids     = array_merge( $course_user_ids, $course_access_users );

	$course_groups_users = get_course_groups_users_access( $course_id );
	$course_user_ids     = array_merge( $course_user_ids, $course_groups_users );

	if ( ! empty( $course_user_ids ) ) {
		$course_user_ids = array_unique( $course_user_ids );
	}

	$course_expired_access_users = get_course_expired_access_from_meta( $course_id );
	if ( ! empty( $course_expired_access_users ) ) {
		$course_user_ids = array_diff( $course_access_list, $course_expired_access_users );
	}

	if ( ! empty( $course_user_ids ) ) {
		$query_args['include'] = $course_user_ids;

		$user_query = new WP_User_Query( $query_args );

		//$course_user_ids = $user_query->get_results();
		return $user_query;
	}
}