code: def get_account_metadata(self, prefix=None):
          
          headers = self.get_account_headers()
          if prefix is None:
              prefix = ACCOUNT_META_PREFIX
          low_prefix = prefix.lower()
          ret = {}
          for hkey, hval in list(headers.items()):
              lowkey = hkey.lower()
              if lowkey.startswith(low_prefix):
                  cleaned = hkey.replace(low_prefix, "").replace("-", "_")
                  ret[cleaned] = hval
          return ret
docs: Returns a dictionary containing metadata about the account.