usage: vespa-security convert-base --from <base N> --to <base M>
Reads up to 1024 bytes of STDIN interpreted as a base N string (ignoring
whitespace) and writes to STDOUT as a base M string. Note that base 64 is
expected to be in (and is output as) the URL-safe alphabet (padding
optional for input, no padding for output).
 -f,--from <arg>   From base. Supported values: 16, 58, 62, 64
 -h,--help         Show help
 -t,--to <arg>     To base. Supported values: 16, 58, 62, 64
Note: this is a BETA tool version; its interface may be changed at any
time.