# Functions
MustInitFromEnv initializes an FTD so that it would be ready for a registration attempt made by the given Firewall Management Center (FMC) if it uses identical TF_VAR_registration_key.
MustRandomizeKey returns a random registration key, for example "0x21ae0cdc4518cc2d", or panics.
RandomizeKey returns a random registration key, for example "0x21ae0cdc4518cc2d".