class Aws::Plugins::RegionalEndpoint

def self.resolve_region(cfg)
  keys = %w(AWS_REGION AMAZON_REGION AWS_DEFAULT_REGION)
  env_region = ENV.values_at(*keys).compact.first
  env_region = nil if env_region == ''
  cfg_region = Aws.shared_config.region(profile: cfg.profile)
  env_region || cfg_region
end