class Signet::OAuth2::Client

hash with the fetched authentication token.
This reopens Client to add #apply and #apply! methods which update a
Signet::OAuth2::Client creates an OAuth2 client

def build_default_connection 

def build_default_connection
  if !defined?(@connection_info)
    nil
  elsif @connection_info.respond_to? :call
    @connection_info.call
  else
    @connection_info
  end
end

def configure_connection options 

def configure_connection options
  @connection_info =
    options[:connection_builder] || options[:default_connection]
  self
end

def fetch_access_token! options = {} 

def fetch_access_token! options = {}
  unless options[:connection]
    connection = build_default_connection
    options = options.merge connection: connection if connection
  end
  info = retry_with_error do
    orig_fetch_access_token! options
  end
  notify_refresh_listeners
  info
end

def retry_with_error max_retry_count = 5 

def retry_with_error max_retry_count = 5
  retry_count = 0
  begin
    yield
  rescue StandardError => e
    raise e if e.is_a?(Signet::AuthorizationError) || e.is_a?(Signet::ParseError)
    if retry_count < max_retry_count
      retry_count += 1
      sleep retry_count * 0.3
      retry
    else
      msg = "Unexpected error: #{e.inspect}"
      raise Signet::AuthorizationError, msg
    end
  end
end

def token_type

The token type as symbol, either :id_token or :access_token 
def token_type
  target_audience ? :id_token : :access_token
end