MadelineProtoDocs/old_docs/API_docs_v100/methods/contacts_resolveUsername.md

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---
title: contacts.resolveUsername
description: You cannot use this method directly, use the resolve_username, get_pwr_chat, get_info, get_full_info methods instead (see https://docs.madelineproto.xyz for more info)
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
---
# Method: contacts.resolveUsername
[Back to methods index](index.md)
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You cannot use this method directly, use the resolve_username, get_pwr_chat, get_info, get_full_info methods instead (see https://docs.madelineproto.xyz for more info)
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### Parameters:
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| Name | Type | Description | Required |
|----------|---------------|-------------|----------|
|username|[string](../types/string.md) | You cannot use this method directly, use the resolve_username, get_pwr_chat, get_info, get_full_info methods instead (see https://docs.madelineproto.xyz for more info) | Yes|
### Return type: [contacts\_ResolvedPeer](../types/contacts_ResolvedPeer.md)
### Can bots use this method: **YES**
### MadelineProto Example ([now async for huge speed and parallelism!](https://docs.madelineproto.xyz/docs/ASYNC.html)):
```php
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();
$contacts_ResolvedPeer = $MadelineProto->contacts->resolveUsername(['username' => 'string', ]);
```
Or, if you're into Lua:
```lua
contacts_ResolvedPeer = contacts.resolveUsername({username='string', })
```
### Errors
| Code | Type | Description |
|------|----------|---------------|
|400|USERNAME_INVALID|The provided username is not valid|
|400|USERNAME_NOT_OCCUPIED|The provided username is not occupied|
|401|AUTH_KEY_PERM_EMPTY|The temporary auth key must be binded to the permanent auth key to use these methods.|
|401|SESSION_PASSWORD_NEEDED|2FA is enabled, use a password to login|
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