> For the complete documentation index, see [llms.txt](https://sending-network.gitbook.io/sending.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sending-network.gitbook.io/sending.network/sdk-documentation/php-sdk/did.md).

# DID

## Login

```php
function login(string $walletAddress, string $privateKey, string $developerKey)
```

Parameters：

| Name            | Type   | Description         | Required |
| --------------- | ------ | ------------------- | -------- |
| `walletAddress` | string | user wallet address | true     |
| `privateKey`    | string | account private key | true     |
| `developerKey`  | string | developer key       | true     |

Returns:

| Name           | Type   | Description  | Required |
| -------------- | ------ | ------------ | -------- |
| `access_token` | string | access token | true     |