class Aws::SharedConfig

def sso_token_from_config(opts = {})

file, if present.
Will always attempt first to load from the shared credentials
Attempts to load from shared config or shared credentials file. 
def sso_token_from_config(opts = {})
  p = opts[:profile] || @profile_name
  token = sso_token_from_profile(@parsed_credentials, p)
  if @parsed_config
    token ||= sso_token_from_profile(@parsed_config, p)
  end
  token
end