Docs for livechat agent departments endpoint (#1433)

* Docs for livechat agent departments endpoint

* Remove pagination support

* Fix version

Co-authored-by: Martin Schoeler <martin.schoeler@rocket.chat>

developer-guides/rest-api/livechat/README.md

@@ -19,6 +19,7 @@ Manage Livechat related data:
 | `/api/v1/livechat/sms-incoming/:service` | `POST` | Send SMS messages to Rocket.Chat. | [info](sms-incoming/) |
 | `/api/v1/livechat/agent.info/:rid/:token` | `GET` | Retrieve the current Livechat agent data. | [info](agent/index.html) |
 | `/api/v1/livechat/agent.next/:token` | `GET` | Request the next Livechat agent available. | [info](agent/index.html#request-the-next-livechat-agent-available) |
+| `/api/v1/livechat/agents/:agentId/departments` | `GET` | Get the agent departments. | [info](agent/index.html#get-agent-departments) |
 | `/api/v1/livechat/config/:token` | `GET` | Get basic Livechat widget configuration info and additional visitor data. | [info](config/index.html) |
 | `/api/v1/livechat/custom.field` | `POST` | Send a Livechat custom field. | [info](custom-fields/index.html#send-a-livechat-custom-field) |
 | `/api/v1/livechat/custom.fields` | `POST` | Send an array of Livechat custom fields. | [info](custom-fields/index.html#send-an-array-of-livechat-custom-fields) |

developer-guides/rest-api/livechat/agent/README.md

@@ -86,3 +86,57 @@ curl http://localhost:3000/api/v1/livechat/agent.next/iNKE8a6k6cjbqWhWd
 | Version | Description |
 | :------ | :---------- |
 | 0.70.0  | Added       |
+
+## Get agent departments.
+
+| URL                                             | Requires Auth | HTTP Method |
+| :---------------------------------------------- | :------------ | :---------- |
+| `/api/v1/livechat/agents/:agentId/departments`  | `yes`          | `GET`       |
+
+## Url params
+
+| Argument | Example               | Required | Description           |
+| :------- | :-------------------- | :------- | :-------------------- |
+| `agentId`  | `iNKE8a6k6cjbqWhWd` | Required | The agent Id.         |
+
+## Example Call
+
+```bash
+curl -H "X-Auth-Token: 9HqLlyZOugoStsXCUfD_0YdwnNnunAJF8V47U3QHXSq" \
+     -H "X-User-Id: aobEdbYhXfu5hkeqG" \
+     http://localhost:3000/api/v1/livechat/agents/iNKE8a6k6cjbqWhWd/departments
+```
+
+## Example Result
+
+```json
+{
+    "departments": [
+        {
+            "_id": "7FKDYAFFQ42tBEizA",
+            "agentId": "bp9s6p76ocZ9QCkbz",
+            "departmentId": "KGvTnGdv7jZYWDK5D",
+            "_updatedAt": "2019-10-01T18:15:38.319Z",
+            "count": 0,
+            "order": 0,
+            "username": "marcos"
+        },
+        {
+            "_id": "hTY4cR3RrkZgZBX4T",
+            "agentId": "bp9s6p76ocZ9QCkbz",
+            "departmentId": "E3vjWSY3wNkW3unBo",
+            "_updatedAt": "2019-10-04T21:46:59.781Z",
+            "count": 0,
+            "order": 0,
+            "username": "marcos"
+        }
+    ],
+    "success": true
+}
+```
+
+## Change Log
+
+| Version | Description |
+| :------ | :---------- |
+| 2.4.0   | Added       |