Protractor parallel testing for multiple login

I need some help with rebuilding my e2e testing (Protractor + Typescript + Jasmine) for parallel test case execution.

Here is the case:
- testing website functions after login,
- my test cases can be split in to two groups - let's name it Test A and Test B,
- Test A is using different login params than Test B,
- let's split both tests groups - 4 test groups in total.

There is a problem with login params. I store them in the local.ts file from which they're being used in page objects. I will need 2 sets of login params (no big deal) and some clever way to change it in local or config file - I don't want to change page objects. Any advice?