text: import os
  
  url = os.getenv("RPI_CLUSTER")
  if not url:
      raise Exception("Missing environment variable: RPI_CLUSTER")
  
  apikey = os.getenv("RPI_APIKEY")
  if not apikey:
      raise Exception("Missing environment variable: RPI_APIKEY")
  
  password = os.getenv("RPI_PASSWORD")
  if not password:
      raise Exception("Missing environment variable: RPI_PASSWORD")
  