@staticmethod<EOL><INDENT>def _credentials_found_in_envars():<DEDENT>
return any([os.getenv('<STR_LIT>'),<EOL>os.getenv('<STR_LIT>'),<EOL>os.getenv('<STR_LIT>'),<EOL>os.getenv('<STR_LIT>')])<EOL>
Check for credentials in envars.

        Returns:
            bool: ``True`` if at least one is found, otherwise ``False``.