MadelineProto/docs/TD_docs/methods/changeUsername.md

title	description
changeUsername	Changes username of logged in user. If something changes, updateUser will be sent

Method: changeUsername

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Changes username of logged in user. If something changes, updateUser will be sent

Params:

Name	Type	Required	Description
username	string	Yes	New value of username. Use empty string to remove username

Return type: Ok

Example:

$MadelineProto = new \danog\MadelineProto\API();
if (isset($token)) { // Login as a bot
    $this->bot_login($token);
}
if (isset($number)) { // Login as a user
    $sentCode = $MadelineProto->phone_login($number);
    echo 'Enter the code you received: ';
    $code = '';
    for ($x = 0; $x < $sentCode['type']['length']; $x++) {
        $code .= fgetc(STDIN);
    }
    $MadelineProto->complete_phone_login($code);
}

$Ok = $MadelineProto->changeUsername(['username' => string, ]);

Or, if you're into Lua:

Ok = changeUsername({username=string, })