assign and return specific data based on user role

I like to understand how I can assign each user who has the role we say that each agent with its own interface, indeed I am applying a solution which set up a system in which an administrator creates a new user with the agent role, an agent can create users with the user role, so we suppose that an admin creates 2 agents: Agent A and agent B each agent accesses the same interface but each one has its own users, I don't like to return all the users of the database in the interface of all the agents, so if agent A is authenticated the interface retrieves only the users who are added by agent A and the same thing for agent B is there a solution? im in laravel 5 here is mu User.php model

namespace App\Models;

use App\Models\Formatters\Formatter;
use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable 
{
    
   

   
    const ROLE_USER  = 'USER';
    const ROLE_ADMIN = 'ADMIN';

 

   
    /**
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password', 'last_login_from', 'role', 'status', 'last_login_at', 'referrer_id'
    ];

    /**
     * 
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token', 'status', 'role', 'last_login_from', 'referrer_id', 'referrer', 'totp_secret'
    ];


   
  
    /**
     * User account
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasOne
     */
    public function account()
    {
        return $this->hasOne(Account::class);
    }

    /**
   
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function referrer()
    {
        return $this->belongsTo(User::class);
    }

    /**
     * Users, referred by current user (referees)
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function referees()
    {
        return $this->hasMany(User::class, 'referrer_id');
    }

  

    /**
     * User games
     *
     * @return $this
     */
    public function games()
    {
        return $this->hasManyThrough(Game::class, Account::class)->where('status', Game::STATUS_COMPLETED);
    }

    /**
     *
     * @param $role
     * @return bool
     */
    public function hasRole($role)
    {
        return isset($this->role) && $this->role == $role;
    }

    public static function roles()
    {
        return [ self::ROLE_USER, self::ROLE_ADMIN];
    }


    /**
     *
     */
    public function admin()
    {
        return $this->hasRole(self::ROLE_ADMIN);
    }

   

}

via Chebli Mohamed