I registered a key for my first assertion, then I received a mail from Ubuntu store with the command able to remove a gpg key from backend: snapcraft revoke-key name_of_key This command don't work and produces the following output: snapcraft revoke-key name_of_key Usage: snapcraft [options] [--enable-geoip --no-parallel-build] snapcraft [options] init snapcraft [options] pull [<part> ...] [--enable-geoip] snapcraft [options] build [<part> ...] [--no-parallel-build] snapcraft [options] stage [<part> ...] snapcraft [options] prime [<part> ...] snapcraft [options] strip [<part> ...] snapcraft [options] clean [<part> ...] [--step <step>] snapcraft [options] snap [<directory> --output <snap-file>] snapcraft [options] cleanbuild [--remote=<remote>] snapcraft [options] login snapcraft [options] logout snapcraft [options] list-registered snapcraft [options] registered snapcraft [options] list-keys snapcraft [options] keys snapcraft [options] create-key [<key-name>] snapcraft [options] register-key [<key-name>] snapcraft [options] register <snap-name> [--private] snapcraft [options] sign-build <snap-file> [--key-name=<key-name>] [--local] snapcraft [options] upload <snap-file> snapcraft [options] push <snap-file> [--release <channels>] snapcraft [options] release <snap-name> <revision> <channel> snapcraft [options] status <snap-name> [--series=<series>] [--arch=<arch>] snapcraft [options] history <snap-name> [--series=<series>] [--arch=<arch>] snapcraft [options] close <snap-name> <channel_names>... snapcraft [options] list-plugins snapcraft [options] plugins snapcraft [options] tour [<directory>] snapcraft [options] update snapcraft [options] gated <snap-name> snapcraft [options] validate <snap-name> <validation>... [--key-name=<key-name>] snapcraft [options] define <part-name> snapcraft [options] search [<query> ...] snapcraft [options] enable-ci [<ci-system>] [--refresh] snapcraft [options] help (topics | <plugin> | <topic>) [--devel] snapcraft (-h | --help) snapcraft --version snapcraft --version -> 2.27.1