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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _handle_tag_salt_auth_creds(self, tag, data):
        '''
        Handle a salt_auth_creds event
        '''
        key = tuple(data['key'])
        log.debug(
            'Updating auth data for %s: %s -> %s',
            key, salt.crypt.AsyncAuth.creds_map.get(key), data['creds']
        )
        salt.crypt.AsyncAuth.creds_map[tuple(data['key'])] = data['creds']