code: def no_going_back(confirmation):
      
      if not confirmation:
          confirmation = 'yes'
  
      prompt = ('This action cannot be undone! Type "%s" or press Enter '
                'to abort' % confirmation)
  
      ans = click.prompt(prompt, default='', show_default=False)
      if ans.lower() == str(confirmation):
          return True
  
      return False
docs: Show a confirmation to a user.
  
      :param confirmation str: the string the user has to enter in order to
                               confirm their action.