Yep, me to. Since it's just textfiles I can have them checked into git and share them. Credentials stays in a separate environments file (not checked in). I'm pretty happy with this setup.
I use the VS Code REST extension a lot but it does lack some of the aspects that make Postman easier for teams and larger projects. It's super easy to define a "collection" as an .http page for smaller and one-off needs though.
Here's one I just found: https://marketplace.visualstudio.com/items?itemName=humao.re...
Syntax looks like: