$ pda set a b --ttl 3343r --> FAIL
Error: invalid argument "3343r" for "-t, --ttl" flag: time: unknown unit "r" in duration "3343r"
Usage:
  pda set KEY[@DB] [VALUE] [flags]

Aliases:
  set, s

Flags:
  -h, --help           help for set
      --secret         Mark the stored value as a secret
  -t, --ttl duration   Expire the key after the provided duration (e.g. 24h, 30m)