Method: account.checkUsername

Validates a username and checks availability.

Parameters:

Name	Type	Description	Required
username	string	username Accepted characters: A-z (case-insensitive), 0-9 and underscores. Length: 5-32 characters.	Yes

Return type: Bool

Can bots use this method: NO

MadelineProto Example (now async for huge speed and parallelism!):

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();

// PHP 8+ syntax, use an array on PHP 7.
$Bool = $MadelineProto->account->checkUsername(username: 'string', );