code: def run(self, *args):
          
          params = self.parser.parse_args(args)
  
          from_uuid = params.from_uuid
          to_uuid = params.to_uuid
  
          code = self.merge(from_uuid, to_uuid)
  
          return code
docs: Merge two identities.
  
          When <from_uuid> or <to_uuid> are empty the command does not have
          any effect. The same happens when both <from_uuid> and <to_uuid>
          are the same unique identity.