code: def index(path=None):
      
      payload = {
          "username": "soandso",
          "message": "Hello bot",
          "vars": {
              "name": "Soandso",
          }
      }
      return Response(r"""Usage: curl -i \
      -H "Content-Type: application/json" \
      -X POST -d '{}' \
      http://localhost:5000/reply""".format(json.dumps(payload)),
      mimetype="text/plain")
docs: On all other routes, just return an example `curl` command.