Checking if the user is online in Laravel

I am beginner in Laravel. I use Laravel 5.8 in my project. I have this Model:

class User extends Authenticatable implements MustVerifyEmail
{
    use Notifiable;
    public static $roles = [];


    protected $fillable = ['last_activity', 'enable', 'name', 'surname', 'email', 'email_verified_at', 'password', 'counter', 'url_address', 'isCompany', 'isMailing'];


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

    public function roles()
    {
        return $this->belongsToMany('App\Role');
    }

    public function mainRole()
    {
        return $this->hasOne('App\Role');
    }

    public function comments()
    {
        return $this->hasMany('App\Comments');
    }


    public function hasRole(array $roles)
    {

        foreach ($roles as $role) {

            if (isset(self::$roles[$role])) {
                if (self::$roles[$role]) return true;

            } else {
                self::$roles[$role] = $this->roles()->where('name', $role)->exists();
                if (self::$roles[$role]) return true;
            }

        }
        return false;
    }

    public function loginHistory()
    {
        return $this->hasMany('App\UserLoginHistory');
    }

    public function companies()
    {
        return $this->belongsTo('App\Companies', 'company_id');
    }


    public function images()
    {
        return $this->hasManyThrough('App\UploadedFiles', 'App\User', 'id', 'photoable_id');
    }


    public function scopeOfRoleType($query, $types)
    {
        return $query->whereHas('roles', function ($q) use ($types) {
            $q->whereIn('name', $types);
        });
    }



}

In last_activity - I have date for example 2019-07-16 10:26:12

I need show on my twig page:

@foreach ($usersList as $user)
User name: $user->name is now ...... (offline or online)

@endforeach

I would like to see if the user is online or offline.

I think about something like this:

public function isOnline()
        {
            return .....
        }

but I do not know how to check this activity :(

Please help.

via Chebli Mohamed