Was wondering what function to call to get the current users wallet balance and display
in a flash message upon login.

Thanks in advance!
-Sudo

@Sudo
https://doc.osclass.org/Hooks

It seems hook for login does not exists, maybe it is somewhere in core.

You can get wallet amount with code:
<?php echo osp_format_price(ModelOSP::newInstance()->getWallet(osc_logged_user_id())); ?>