PHP с MySQL войти, используя password_verify

Когда я пытаюсь войти в систему с помощью password_hash а также password_verify похоже, все время возвращает false.

Вот мой код

<-----Login page---->
<?php

require_once '../../includes/initialize.php';

if($session->is_logged_in()){

redirect_to("index.php");
}if (isset($_POST['submit'])){

$username = trim($_POST['username']);
$password = trim($_POST['password']);
//Check database to see if username/password exist.

$found_user = User::authenticate($username, $password);

if ($found_user) {
$session->login($found_user);
log_action('Login', "{$found_user->username} logged in.");
redirect_to("index.php");
}else{

$message = "Username/Password combination incorrect.";

}}else{

$username = "";
$password = "";
}

?>

<---Create New Admin Page-->
<?php

require_once '../../includes/initialize.php';if(!$session->is_logged_in()){redirect_to("login.php");}

?>

<?php

if(isset($_POST['submit'])){
$required_fields = array("first_name", "last_name", "username", "password", "confirm_password");
validate_presences($required_fields);

if (empty($errors)) {
$first_name = trim($_POST['first_name']);
$last_name = trim($_POST['last_name']);
$username = trim($_POST['username']);
$password = trim($_POST['password']);
$confirm_password= trim($_POST['confirm_password']);

if ($password != $confirm_password) {
$message = "Passwords does not match!";
}else{

$hashed_password = password_hash($password, PASSWORD_BCRYPT, ['cost' => 10]);
$user = new User();
$user->first_name = $first_name;
$user->last_name = $last_name;
$user->username = $username;
$user->password = $hashed_password;

if($user->create()){
$session->message("Admin {$user->username} created successfully.");
redirect_to('manage_admins.php');
}else {
$message = "Admin can't be created!";
}
}

}
}else{
$first_name = "";
$last_name = "";
$username = "";
}?>

<------User Object Page ----->
<?php

require_once (LIB_PATH.DS.'database.php');

class User extends DatabaseObject{

protected static $table_name = "users";
protected static $db_fields = array('id', 'username', 'password', 'first_name', 'last_name');
public $id;
public $username;
public $password;
public $first_name;
public $last_name;public function full_name(){
if(isset($this->first_name) && isset($this->last_name)){

return $this->first_name." ".$this->last_name;
}else{

return "";
}
}public static function authenticate($username="", $password=""){

global $database;
$username = $database->escape_value($username);
$password = $database->escape_value($password);

$sql = "SELECT * FROM users WHERE username = '{$username}' LIMIT 1";
$result_array = self::find_by_sql($sql);
$admin = !empty($result_array) ? array_shift($result_array) : false;
if ($admin) {
//Found Admin Now check password
if (password_verify($password, $admin->password)) {
return $admin;

}else {
return false;
}

}

}}?>