# Create Access Token

## Overview

The `createAccessToken` method generates a short-lived authentication token.

## Request Fields

| Field       | Type    | Required | Description         |
| ----------- | ------- | -------- | ------------------- |
| `scope`     | String  | No       | Token scope         |
| `expiresIn` | Integer | No       | Lifetime in seconds |

## Response Fields

| Field         | Type   | Description  |
| ------------- | ------ | ------------ |
| `accessToken` | String | Token string |
| `tokenType`   | String | Bearer       |

## Example

```java
Map<String, Object> request = new HashMap<>();
request.put("scope", "payment:write");
request.put("expiresIn", 3600);

Map<String, Object> response = authClient.createAccessToken(request);
```