Gitlab-EE User Licenses

Quick question about users and how they are calculated for licensing.

Internally we have 5 developers and have installed Gitlab Enterprise on prem. We purchased licensing for 5 users. If we want to enable users outside of the dev team to report issues and also be able to see which users created the issues, will we need to have licensing for all of those users even though they are not contributing to code? It doesn’t seem to be clearly defined. If this was covered in the docs and I missed it, I apologize.

Thanks in advance!