Streaming code update for different format in the response from schwab

[hn4002]

I tried to use the streaming feature from schwab-py and encountered some errors during the initialization. These are the issues I found which I fixed locally and then the streaming initialization went fine.

The below issues are because of the difference in the response from the Schwab's API as compared to the TDA API.

At https://github.com/alexgolec/schwab-py/blob/main/schwab/streaming.py#L215, it should be changed like this:

<                 if int(account['accountId']) == self._account_id:
---
>                 if int(account['accountNumber']) == self._account_id:

At https://github.com/alexgolec/schwab-py/blob/main/schwab/streaming.py#L229 , it should be changed like this:

229c229
<         stream_info = prefs['streamerInfo'][streamer_info_idx]
---
>         stream_info = prefs['streamerInfo'][0]

The reason is that Schwab API returns only one object in the streamerInfo array even though there are multiple accounts.

With the above changes, I was able to use schwab-py to start the streaming and subscribe to quote, candle and l2 data.

[hn4002]

This is the response from https://api.schwabapi.com/trader/v1/userPreference (response masked for sensitive information):

{
    "accounts": [
        {
            "accountNumber": "12345678",
            "primaryAccount": false,
            "type": "BROKERAGE",
            "nickName": "XXXXXXX",
            "displayAcctId": "...xxx",
            "autoPositionEffect": false,
            "accountColor": "Green"
        },
        {
            "accountNumber": "23456789",
            "primaryAccount": false,
            "type": "BROKERAGE",
            "nickName": "xxxxxxxxx",
            "displayAcctId": "...xxx",
            "autoPositionEffect": false,
            "accountColor": "Green"
        },
        {
            "accountNumber": "34567890",
            "primaryAccount": false,
            "type": "BROKERAGE",
            "nickName": "xxxxxxxxxx",
            "displayAcctId": "...xxx",
            "autoPositionEffect": false,
            "accountColor": "Blue"
        },
        {
            "accountNumber": "45678901",
            "primaryAccount": false,
            "type": "BROKERAGE",
            "nickName": "xxxxxxxx",
            "displayAcctId": "...xxx",
            "autoPositionEffect": false,
            "accountColor": "Green"
        },
        {
            "accountNumber": "56789012",
            "primaryAccount": true,
            "type": "BROKERAGE",
            "nickName": "xxxxxxxxx",
            "displayAcctId": "...xxx",
            "autoPositionEffect": false,
            "accountColor": "Green"
        }
    ],
    "streamerInfo": [
        {
            "streamerSocketUrl": "wss://streamer-api.schwab.com/ws",
            "schwabClientCustomerId": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
            "schwabClientCorrelId": "xxxxxxxx",
            "schwabClientChannel": "N9",
            "schwabClientFunctionId": "APIAPP"
        }
    ],
    "offers": [
        {
            "level2Permissions": true,
            "mktDataPermission": "NP"
        }
    ]
}

[alexgolec]

This is now fixed