code: def get(cls):
          
          apikey = cls.__api_key or cls.__api_key_env_var
  
          if apikey:
              return apikey
          else:
              raise APIKeyMissingError("API key not set")
docs: Get the current API key.
          if one has not been given via 'set' the env var STEAMODD_API_KEY will
          be checked instead.