is_verified = users.any?{ |username|
      passwd = Etc.getpwnam(username)
      homedir = passwd.dir
      authorized_keys = HrrRbSsh::Compat::OpenSSH::AuthorizedKeys.new(File.read(File.join(homedir, '.ssh', 'authorized_keys')))
      authorized_keys.any?{ |public_key| context.verify username, public_key.algorithm_name, public_key.to_pem }