async def message_from_token(self, token: Text, payload: Any)-> Tuple[Optional[BaseMessage], Optional[Platform]]:
async for platform in self.get_all_platforms():<EOL><INDENT>m = await platform.message_from_token(token, payload)<EOL>if m:<EOL><INDENT>return m, platform<EOL><DEDENT><DEDENT>return None, None<EOL>
Given an authentication token, find the right platform that can
recognize this token and create a message for this platform.

The payload will be inserted into a Postback layer.