Get -- handles GET request to /messages/ to fetch all messages params: w - response writer for building JSON payload response r - request reader to fetch form data or url params (unused here).

GetOne -- handles GET request to /messages/{message_uuid} to fetch one message params: w - response writer for building JSON payload response r - request reader to fetch form data or url params.

Post -- handles POST request to /messages/new to create a new message params: w - response writer for building JSON payload response r - request reader to fetch form data or url params.

AllMessagesResponse struct for an array of Message structs.

ErrorResponse for sending back a potential array of error strings.

GetMessageResponse struct for embedding a single message.

Message struct for preparing JSON payload.

NewMessageResponse struct for returning ID of message in payload.