MadelineProto/old_docs/API_docs_v70/methods/channels_checkUsername.md

---
title: channels.checkUsername
description: channels.checkUsername parameters, return type and example
---
## Method: channels.checkUsername  
[Back to methods index](index.md)


### Parameters:

| Name     |    Type       | Required |
|----------|---------------|----------|
|channel|[InputChannel](../types/InputChannel.md) | Optional|
|username|[string](../types/string.md) | Yes|


### Return type: [Bool](../types/Bool.md)

### Can bots use this method: **NO**


### Errors this method can return:

| Error    | Description   |
|----------|---------------|
|CHANNEL_INVALID|The provided channel is invalid|
|CHAT_ID_INVALID|The provided chat id is invalid|
|USERNAME_INVALID|The provided username is not valid|


### Example:


```
$MadelineProto = new \danog\MadelineProto\API();
$MadelineProto->session = 'mySession.madeline';
if (isset($number)) { // Login as a user
    $MadelineProto->phone_login($number);
    $code = readline('Enter the code you received: '); // Or do this in two separate steps in an HTTP API
    $MadelineProto->complete_phone_login($code);
}

$Bool = $MadelineProto->channels->checkUsername(['channel' => InputChannel, 'username' => 'string', ]);
```

Or, if you're using the [PWRTelegram HTTP API](https://pwrtelegram.xyz):



### As a user:

POST/GET to `https://api.pwrtelegram.xyz/userTOKEN/channels.checkUsername`

Parameters:

channel - Json encoded InputChannel

username - Json encoded string




Or, if you're into Lua:

```
Bool = channels.checkUsername({channel=InputChannel, username='string', })
```