have test_all_credentials.sh use --local-user instead of --default-key
have test_all_credentials.sh use --local-user instead of --default-key

The latter will fall back to other keys if the one you asked for isn't
present :p :p :p

keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client