Cant verify public key (CUDA 11.7.1 & 11.8.1)

Hi,

I’m having troubles with setting up CUDA on a new laptop running the 3050 mobile GF. After running sudo dpkg -i cuda-repo-ubuntu2204-11-8-local_11.8.0-520.61.05-1_amd64.deb as described on the CUDA download site, I receive the error listed below, when running sudo apt-get update

Err:7 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC

And,

W: GPG error: https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I’ve found a thread covering a similar issue from april this year, but have yet to find a solution covering my current issue.