room keys-keys-{room Id}

Number of APIs: 3

1. Retrieve the keys from the backup for a given room. GET {{baseUrl}}/room_keys/keys/:roomId?version=1

2. Delete the keys from the backup for a given room. DELETE {{baseUrl}}/room_keys/keys/:roomId?version=1

3. Store several keys in the backup for a given room. PUT {{baseUrl}}/room_keys/keys/:roomId?version=1