docs: def __generateOTPKs(self, num_otpks = None):
          """
          Generate the given amount of OTPKs.
  
          :param num_otpks: Either an integer or None.
  
          If the value of num_otpks is None, set it to the max_num_otpks value of the
          configuration.
          """
  
          if num_otpks == None:
              num_otpks = self.__max_num_otpks
          
          otpks = []
  
          for _ in range(num_otpks):
              otpks.append(self.__KeyPair.generate())
  
          try:
              self.__otpks.extend(otpks)
          except AttributeError:
              self.__otpks = otpks