Method authenticate

python/ccxt/pro/gate.py:2028–2036

(self, url, messageType)

        return await self.watch_multiple(url, messageHashes, message, messageHashes, sub)

    async def authenticate(self, url, messageType):
        channel = messageType + '.login'
        client = self.client(url)
        messageHash = 'authenticated'
        future = client.reusableFuture(messageHash)
        authenticated = self.safe_value(client.subscriptions, messageHash)
        if authenticated is None:
            return await self.request_private(url, {}, channel, messageHash)
        return future

    def handle_authentication_message(self, client: Client, message):
        messageHash = 'authenticated'