MadelineProtoDocs/old_docs/API_docs_v4/methods/auth.checkPassword.md

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---
title: auth.checkPassword
description: Try logging to an account protected by a [2FA password](https://core.telegram.org/api/srp).
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
redirect_from: /API_docs/methods/auth_checkPassword.html
---
# Method: auth.checkPassword
[Back to methods index](index.md)
Try logging to an account protected by a [2FA password](https://core.telegram.org/api/srp).
### Parameters:
| Name | Type | Description | Required |
|----------|---------------|-------------|----------|
|password\_hash|[bytes](../types/bytes.md) | | Yes|
### Return type: [auth.Authorization](../types/auth.Authorization.md)
### Can bots use this method: **NO**
### MadelineProto Example ([now async for huge speed and parallelism!](https://docs.madelineproto.xyz/docs/ASYNC.html)):
```php
if (!file_exists('madeline.php')) {
copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
include 'madeline.php';
$MadelineProto = new \danog\MadelineProto\API('session.madeline');
$MadelineProto->start();
$auth.Authorization = $MadelineProto->auth->checkPassword(['password_hash' => 'bytes', ]);
```
Or, if you're into Lua:
```lua
auth.Authorization = auth.checkPassword({password_hash='bytes', })
```
### Errors
| Code | Type | Description |
|------|----------|---------------|
|400|PASSWORD_HASH_INVALID|The provided password hash is invalid|
|400|SRP_ID_INVALID|Invalid SRP ID provided|
|400|SRP_PASSWORD_CHANGED|Password has changed|