MadelineProtoDocs/old_docs/API_docs_v82/methods/contacts.resolveUsername.md

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---
title: contacts.resolveUsername
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description: You cannot use this method directly, use the resolveUsername, getPwrChat, getInfo, getFullInfo methods instead (see https://docs.madelineproto.xyz for more info)
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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 resolveUsername, getPwrChat, getInfo, getFullInfo methods instead (see https://docs.madelineproto.xyz for more info)
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### Parameters:
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| Name | Type | Description | Required |
|----------|---------------|-------------|----------|
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|username|[string](../types/string.md) | You cannot use this method directly, use the resolveUsername, getPwrChat, getInfo, getFullInfo methods instead (see https://docs.madelineproto.xyz for more info) | Yes|
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### Return type: [contacts.ResolvedPeer](../types/contacts.ResolvedPeer.md)
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### 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');
$MadelineProto->start();
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$contacts.ResolvedPeer = $MadelineProto->contacts->resolveUsername(['username' => 'string', ]);
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```
Or, if you're into Lua:
```lua
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contacts.ResolvedPeer = contacts.resolveUsername({username='string', })
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```
### Errors
| Code | Type | Description |
|------|----------|---------------|
|400|USERNAME_INVALID|The provided username is not valid|
|400|USERNAME_NOT_OCCUPIED|The provided username is not occupied|
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|406|AUTH_KEY_DUPLICATED|An auth key with the same ID was already generated|
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|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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