Filament user avatar not showing

I've tried to do the exact thing like the filament documentation and the user avatar image not showing. Here's my code in User Model :

use Filament\Models\Contracts\HasAvatar;

class User extends Authenticatable implements HasAvatar
{
    use HasApiTokens, HasFactory, Notifiable, HasRoles;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $guarded = [
        'id'
    ];

    /**
     * The attributes that should be hidden for serialization.
     *
     * @var array<int, string>
     */
    protected $hidden = [
        'password',
        'remember_token',
    ];

    /**
     * The attributes that should be cast.
     *
     * @var array<string, string>
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
        'password' => 'hashed',
    ];

    public function getFilamentAvatarUrl(): ?string
    {
        return $this->photo;
    }
}