How to add installation key to dependencies in project.json

We want to add a manage package to our source control, as we are going to add some metadata that will be dependent on this managed package. The problem is this managed package is password protected and I cannot find a way to pass that installation key under the dependencies attributes.  I've found some similar cases but they were like 4 years old, so I'm wondering if anything has changed since then and is it possible to pass an installation key in dependency?  #Package Installation #Password #Package Dependency