You can create credentials using NSC like the below.
nsc add account claude
nsc edit account claude --sk generate
nsc add user claude -a claude
nsc edit account claude --js-mem-storage 64G --js-disk-storage 100G --js-streams 1000 --js-consumer 10000
nsc push --all
nsc pull --all
nsc generate creds -a claude -n claude -o claude.creds
nats context save claude --nsc nsc://socketglobal/claude/claude