room keys-keys-{room Id}-{session Id}

Number of APIs: 3

1. Store a key in the backup. PUT {{baseUrl}}/room_keys/keys/:roomId/:sessionId?version=1

2. Retrieve a key from the backup. GET {{baseUrl}}/room_keys/keys/:roomId/:sessionId?version=1

3. Delete a key from the backup. DELETE {{baseUrl}}/room_keys/keys/:roomId/:sessionId?version=1