vipaccess --help should mention "show" is the default action if no action is given

[jidanni]

$ vipaccess --help
usage: vipaccess [-h] {provision,check,show,uri} ...

positional arguments:
  {provision,check,show,uri}
    provision           Provision a new VIP Access credential
    check               Check if a VIP Access credential is working
    show                Show the current 6-digit token
    uri                 Export the credential as a URI (otpauth://)

optional arguments:
  -h, --help            show this help message and exit

Within this message do mention: default action: show.