use Digest::SHA1 qw(sha1_hex);

    print <<EOF;
Usage: $0 NAME

    print q%
Usage: hydra-create-user NAME

  [--password-hash SHA1-HASH]

  [--password-hash HASH]

Example:
  \$ hydra-create-user alice --password foobar --role admin
EOF

* PASSWORD HASH
The password hash should be an Argon2id hash, which can be generated
via:
    $ nix-shell -p libargon2
    [nix-shell]$ argon2 "$(LC_ALL=C tr -dc '[:alnum:]' < /dev/urandom | head -c16)" -id -t 3 -k 262144 -p 1 -l 16 -e
    foobar
    Ctrl^D
    $argon2id$v=19$m=262144,t=3,p=1$NFU1QXJRNnc4V1BhQ0NJQg$6GHqjqv5cNDDwZqrqUD0zQ
SHA1 is also accepted, but SHA1 support is deprecated and the user's
password will be upgraded to Argon2id on first login.
Examples:
Create a user with an argon2 password:
  $ hydra-create-user alice --password-hash '$argon2id$v=19$m=262144,t=3,p=1$NFU1QXJRNnc4V1BhQ0NJQg$6GHqjqv5cNDDwZqrqUD0zQ' --role admin
Create a user with a password insecurely provided on the commandline:
  $ hydra-create-user alice --password foobar --role admin
%;

            $passwordHash = sha1_hex($password);

            $user->setPassword($password);