Keys must be called REGISTRY_USERNAME and REGISTRY_PASSWORD.
REGISTRY_USERNAME must equal $oauthtoken. REGISTRY_PASSWORD is your API you generate from your NVIDIA Cloud account.
This post explains how to run VASP with GPU acceleration inside Modal. It uses VASP version 6.3.0 and should work for other 6.x.x builds. The idea is to create a Modal Image that has an OpenACC-enabled GPU workflow, based on NVIDIA’s HPC SDK. The result is a self-contained image that can run GPU-accelerated VASP calculations in a serverless Modal environment.