class Aws::SSOCredentials

def sso_cache_file
  start_url_sha1 = OpenSSL::Digest::SHA1.hexdigest(@sso_start_url.encode('utf-8'))
  File.join(Dir.home, '.aws', 'sso', 'cache', "#{start_url_sha1}.json")
rescue ArgumentError
  # Dir.home raises ArgumentError when ENV['home'] is not set
  raise ArgumentError, "Unable to load sso_cache_file: ENV['HOME'] is not set."
end