* queue
* messaging
- pip install redis -t 'path/to/lambda/file'
- copy the ./common folder to 'path/to/lambda/file'
- zip the folder content
* queue/listener -> DELETE, POST, GET
* queue/speaker -> DELETE, POST, GET
* statusCode: int
* errorMessage: string
* infoMessage: string
* data: string(listener) | list(speakers)