undefined method std class error in laravel

  This code related to our group project.when i use below code it is give    

Call to undefined method stdClass::subjects().I tried many ways but can not solved.following code part give the error

,{$user->subjects()->get()[1]->name}} @foreach($users as $user)

    <tr><td> </td>
    <td> </td>
    <td>    </td>

  <td>,{$user->subjects()->get()[1]->name}}    </td>
</tr>

@endforeach

codes of Subject.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Subject extends Model
{
      protected $table='subject';

    protected  $fillable = ['id','name','created_at','updated_at','user_id'];

    protected $primaryKey='id';

    public function user(){
      return $this->belongsTo('App\User');

}

codes of User.php

 <?php

    namespace App;

    use Illuminate\Notifications\Notifiable;
    use Illuminate\Foundation\Auth\User as Authenticatable;

    class User extends Authenticatable
    {
        use Notifiable;
    protected $table='users';

        protected $fillable = [
            'usertype','name','lname', 'email','dob','school','phone','gender','password','verifyToken'
        ];


        protected $hidden = [
            'password', 'remember_token',
        ];

    )    

        }

         public function subjects()
        {
            return $this->hasMany('App\Subject','user_id','id');
        }




    }

via Chebli Mohamed