def is_valid_command(command)
      valid_commands = ["open", "close", "rsp", "syslog"]
      if !valid_commands.include?(command)
        @logger.error 'Invalid RELP command'
        raise Relp::InvalidCommand.new('Invalid command')
      end
    end
def is_valid_command(command)
      valid_commands = ["open", "close", "rsp", "syslog"]
      if !valid_commands.include?(command)
        @logger.error 'Invalid RELP command'
        raise Relp::InvalidCommand.new('Invalid command')
      end
    end
Check if command is one of valid commands if not raise exception