docs: def _db_urls(opts: Namespace) -> Tuple[str, str]:
          """
          Return the crc and ontology db urls
          :param opts: options
          :return: Tuple w/ crc and ontology url
          """
          return opts.crcdb.replace("//", "//{crcuser}:{crcpassword}@".format(**opts.__dict__)),\
              opts.ontodb.replace("//", "//{ontouser}:{ontopassword}@".format(**opts.__dict__))