Is it possible to convert AlpacaData to pandas/numpy/CSV data?

I adapted the following code from the `README.md`:
```
import alpaca_backtrader_api
import backtrader as bt
from datetime import datetime

ALPACA_API_KEY = "..."
ALPACA_SECRET_KEY = "..."
ALPACA_PAPER = True

store = alpaca_backtrader_api.AlpacaStore(key_id = ALPACA_API_KEY,
secret_key = ALPACA_SECRET_KEY,
paper = ALPACA_PAPER)

data = store.getdata(dataname = "AAPL",
historical = True,
fromdate = datetime(2015, 1, 1),
timeframe = bt.TimeFrame.Days)
```

The resulting `data` of type `AlpacaData` works fine with cerebro, but I'm struggling to figure out how it's possible to use directly. `len(data)` returns `0`. My goal is simply to perform some general analyses like identifying local extrema to help in developing my strategy. I guess I could download the data once through `alpaca-backtrader-api` for backtesting, and then again through the Alpaca API for other analyses, but isn't there any way to just do it once to get an `AlpacaData` object (which I guess is a Backtrader data feed?), and then convert that to a numpy series, or a pandas DataFrame, or CSV?

Apologies if I'm missing something obvious. I'm new to both Backtrader and Alpaca. I wanted to first ask the Backtrader community, but unfortunately their forum is not letting me register because the CAPTCHA isn't loading.