Switched to singularity registry login

Author: jmfernandez

.github/workflows/container.yml

@@ -95,7 +95,7 @@ jobs:
       - name: Login and Deploy Container
         if: (github.event_name != 'pull_request') && ( env.keepgoing == 'true' )
         run: |         
-          echo "${{ secrets.GITHUB_TOKEN }}" | singularity remote login -u "${{ secrets.GHCR_USERNAME }}" --password-stdin oras://ghcr.io
+          singularity registry login -u "${{ github.actor }}" -p "${{ secrets.GITHUB_TOKEN }}" oras://ghcr.io
           declare -a tags=( ${{ needs.gather-metadata.outputs.tags }} )
           for tag in "${tags[@]}" ; do
             echo singularity push container.sif "oras://ghcr.io/${GITHUB_REPOSITORY}:${tag}"