Importing datasmith files

so I have game project and I want to import from revit via datasmith but because I started the project as a game I dont have the datasmith button to import the data . so whats the first step ? (currently I’m doing it in an stupid way of importing it in an architecture project and then migrate it to this project)

Alright i know its silly but in 4.24 there is built-in plugin Datasmith Importer .