<?php

function getUserList()
{
    return $user = [
        [
            'id' => 66,
            'username' => 'gigi',
            'password' => 'coco',
        ],
        [
            'id' => 67,
            'username' => 'coco',
            'password' => 'gigi',
        ],
    ];
}

function getUserByUserPass($username, $pass)
{
  $userList = getUserList();
  foreach($userList as $user)
  {
    if($username == $user['username'] && $pass == $user['password'])
    {
        return $user;
    }
  }
  return false;
}