Use caju's api to get all past transactions and generate an OFX file with them that can then be imported into Actual Budget (or any other budgeting application).
To execute this app, you'll need to get a hold of your own bearer token, authentication token and user/employee IDs from Caju.
I got those by using a man in the middle proxy and Frida on my android phone. Your mileage may vary.
Copy the .env.example file to .env and fill it in with your information
cp .env.example .env