Add updated available data feed connections

I'm not sure how often the data feed connection list gets updated, but there have been a few not available, including the broker connections. It would be nice if mc updates kept up to date with available feeds over time.

I was interested in testing https://polygon.io/ It seems to have a direct data feed to the markets.

webull is an almost free data feed and broker that seems to be picking up traction in the world.

Here are results from just the first page of a basic google search, some are free sources:
*https://subscribe.fasttrack.net/landing/api/apilanding.html?gclid=Cj0KCQjwit_8BRCoARIsAIx3Rj7lzcqHf4J9uzaX-aNGHg06BEqxMnRoscHamiaNYVk2Syyuv-mr-KoaAnBjEALw_wcB

*https://www.quotestream.com/

*https://www.alphavantage.co/

*https://marketstack.com/product !!!(this one looks really interesting. I would like to try it out.)!!!

*https://intrinio.com/financial-market-data

*https://finnhub.io/pricing-stock-api-market-data !!!(would like to try this one out too.)!!!

So, that was just a few links from a simple google search and I already found two more I would really l ike to test. Perhaps there's a way to have a customized data feed connection options that a mc user can install with the feeds API keys or somethig like that?

Thanks!