<?php

public function getTutorCourses(object $user): array
    {
        $courses = [];
        $groups = Group::with('courses')->where('tutor_id', $user->id)->get()->toArray();
        foreach ($groups as $group) {
            $course = $group['courses'];
            dump(gettype($course), $course);
            $course['ads'] = 777;
            array_push($courses, $course);
        }
        return $courses;
    }