MadelineProto/docs/API_docs/methods/account_updateUsername.md

title	description
account.updateUsername	Update this user's username

Method: account.updateUsername

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Update this user's username

Parameters:

Name	Type	Required	Description
username	CLICK ME string	Yes	The new username

Return type: User

Can bots use this method: NO

Errors this method can return:

Error	Description
USERNAME_INVALID	The provided username is not valid
USERNAME_NOT_MODIFIED	The username was not modified
USERNAME_OCCUPIED	The provided username is already occupied

MadelineProto Example:

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

// !!! This API id/API hash combination will not work !!!
// !!! You must get your own @ my.telegram.org !!!
$api_id = 0;
$api_hash = '';

$MadelineProto = new \danog\MadelineProto\API('session.madeline', ['app_info' => ['api_id' => $api_id, 'api_hash' => $api_hash]]);
$MadelineProto->start();

$User = $MadelineProto->account->updateUsername(['username' => 'string', ]);

PWRTelegram HTTP API example (NOT FOR MadelineProto):

As a user:

POST/GET to https://api.pwrtelegram.xyz/userTOKEN/account.updateUsername

Parameters:

username - Json encoded string

Or, if you're into Lua:

User = account.updateUsername({username='string', })