GenerateRandomCredentials errors not being checked

[JeremyRand]

In a couple places, the error returned by GenerateRandomCredentials is discarded:

• https://github.com/robertmin1/heteronculous-horklump/blob/fe0fa005b074e0464c856940333eee02e874ae57/main.go#L113-L116
• https://github.com/robertmin1/heteronculous-horklump/blob/fe0fa005b074e0464c856940333eee02e874ae57/main.go#L486-L487

This seems dangerous, as it will cause stream isolation to be silently disabled if the PRNG fails for some reason.

[robertmin1]

Implemented, but the error will be handled through panic, since it's not in the strace.Trace funciton. A warning can also be used, but panic might be better

[robertmin1]

Checking the errors