.gitignore Project Variables

I am working with a team of three, and each of us uses our own credentials to launch the SSO application. Soon, we will be contributing to the project using a GitHub repo. I know that files such as the logs are not included when pushing code to the repo.

Is it possible to implement a similar solution for specific project variables, so that we don't have to update the username and password values every time we pull/push code?

Thank you.