An alternative (and free for most cases) bank connections could be done with https://docs.saltedge.com/account_information/v5/#quick_start .
The project https://github.com/firefly-iii/firefly-iii currently have this implementations and it works perfectly, but FireFly III features are quite reduced. In fact, at the docs suggest GNUCash when a more complex financial app is required (https://firefly-iii.readthedocs.io/en/latest/support/features.html) :)

Please consider adding this api to automatically obtain the back transactions. The api is well documented and quite simple to connect.
https://docs.firefly-iii.org/en/latest/import/spectre.html

Thank!