## List email subscribers

Retrieve all email subscription objects for this merchant. Each object contains the email address,
language, and all subscribed notification topics for that email.

This endpoint requires authentication and will return an array of email subscription objects,
where each object represents one email address with all its notification topic subscriptions.

## Endpoint signature

```http
POST https://api.reservepay.com/merchants/list-email-subscribers HTTP/1.1
Content-Type: application/json
Accept: application/json
Authorization: Bearer <token>

{}
```

Returns: array

## Response attributes

### `email` (string)

**Always present**. The email address subscribed to notifications.

### `language` (string)

**Always present**. The language for notifications sent to this email address.

Possible values:

- `en`
- `th`

### `notification_topics` (array)

**Always present**. The notification topic this email is subscribed to.

## Errors common to all endpoints

### `UNHANDLED_ERROR`

This error occurs when the server encounters an unexpected internal error that
it cannot handle gracefully. This typically happens due to bugs, infrastructure
issues, or edge cases that weren't anticipated during development.

### `INVALID_ARGUMENTS`

This error occurs when the request contains invalid or missing parameters.
Common cases include missing required fields, or values that don't match the
expected format or type.

### `BAD_VERSION`

This error occurs when making requests to an API version that does not exist.
This commonly happens when using an outdated SDK or when the API version
specified in the request URL is incorrect.