Ensure we return the room_id after knocking via the CS API
@@ -216,13 +216,16 @@ This endpoint requires authentication and can be rate limited.
#### Responses:
##### Status code 200:
-The user knocked successfully. Example reply:
+The user knocked successfully. The room ID of the knocked on room is returned. Example
+reply:
```json
-{}
+{
+ "room_id": "!ZclcEpFTORTjmWIrqH:matrix.org"
+}
```
##### Status code 403:
-The user wasn't allowed to knock (e.g. they are banned). Error reply:
+The user wasn't allowed to knock (e.g. they are banned). Example error reply:
```json
{
"errcode": "M_FORBIDDEN",
