MadelineProtoDocs/old_docs/API_docs_v51/methods/channels_checkUsername.md

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channels.checkUsername Check if this username is free and can be assigned to a channel/supergroup https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png

Method: channels.checkUsername

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Check if this username is free and can be assigned to a channel/supergroup

Parameters:

Name Type Description Required
channel Username, chat ID, Update, Message or InputChannel The channel/supergroup Optional
username string The new username for this channel/supergroup Yes

Return type: Bool

Can bots use this method: NO

MadelineProto Example:

if (!file_exists('madeline.php')) {
    copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
define('MADELINE_BRANCH', '');
include 'madeline.php';

$MadelineProto = new \danog\MadelineProto\API('session.madeline');
$MadelineProto->start();

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

Or, if you're into Lua:

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

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