Schwab API Python Integration

I need a Python script to connect / authorize with the Schwab Trader API. The script should pull historical stock prices OHLC for a customizable one year period at a daily interval, as well as volume. The data should be able to be inserted into a PostgreSQL database. The ability to pull multiple stocks at once (i.e: All listed Nasdaq / NYSE stocks) and to cross-reference the date with an earnings calendar (Open to discussion on APIs for this data)

Requirements:
- Connect to Schwab Trader API
- Retrieve daily historical stock prices for 1 year
- Ability to insert the pulled data into a PostgreSQL database
- Clean / Readability of python code in VS Code

Ideal Skills and Experience:
- Proficient in Python
- Experience with APIs, especially Schwab Trader API, and other applicable trader focused APIS
- Strong JSON handling skills