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MadelineProto/old_docs/API_docs_v55/methods/account_checkUsername.md

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---
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title: account.checkUsername
description: Check if this username is available
---
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## Method: account.checkUsername
[Back to methods index](index.md)
Check if this username is available
### Parameters:
| Name | Type | Required | Description |
|----------|---------------|----------|-------------|
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|username|[CLICK ME string](../types/string.md) | Yes|The username to check|
### Return type: [Bool](../types/Bool.md)
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### Can bots use this method: **NO**
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### Errors this method can return:
| Error | Description |
|----------|---------------|
|USERNAME_INVALID|The provided username is not valid|
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### MadelineProto Example:
```
if (!file_exists('madeline.php')) {
copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
include 'madeline.php';
$MadelineProto = new \danog\MadelineProto\API('session.madeline');
$MadelineProto->start();
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$Bool = $MadelineProto->account->checkUsername(['username' => 'string', ]);
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```
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### [PWRTelegram HTTP API](https://pwrtelegram.xyz) example (NOT FOR MadelineProto):
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### As a user:
POST/GET to `https://api.pwrtelegram.xyz/userTOKEN/account.checkUsername`
Parameters:
username - Json encoded string
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Or, if you're into Lua:
```
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Bool = account.checkUsername({username='string', })
```