> For the complete documentation index, see [llms.txt](https://dev.guardian.hedera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.guardian.hedera.com/developer-tools-and-resources/api-reference/account-apis/change-password.md).

# Change Password

**`POST /accounts/change-password`**

Changes the authenticated user's password.

**Authentication:** Bearer token required (`Authorization: Bearer <token>`)

***

## Request

### Request Body

```json
{
  "username": "example_user",
  "oldPassword": "examplePassword123",
  "newPassword": "newSecurePassword456"
}
```

| Field         | Type   | Required | Description             |
| ------------- | ------ | -------- | ----------------------- |
| `username`    | string | Yes      | The account username    |
| `oldPassword` | string | Yes      | The current password    |
| `newPassword` | string | Yes      | The new password to set |

***

## Response

### Success Response

**Status:** `200 OK`

```json
{
  "username": "example_user",
  "role": "STANDARD_REGISTRY",
  "did": "did:hedera:testnet:zHcDLGFNymFAJiMBKnpbHDgjvTn6yZnwkPPeFhtJBECH_0.0.4532001",
  "accessToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "refreshToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}
```

### Error Responses

| Status                      | Description                          |
| --------------------------- | ------------------------------------ |
| `401 Unauthorized`          | Invalid credentials or missing token |
| `500 Internal Server Error` | Unexpected server failure            |