iao_team/app/Models/MemberCourse.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class MemberCourse extends Model
{
    use HasFactory;

    protected $fillable = [
        'member_id',
        'course_id',
        'date_from',
        'date_to',
        'when'
    ];

    public function member()
    {
        return $this->belongsTo(Member::class);
    }

    public function course()
    {
        return $this->belongsTo(Course::class);
    }
}