http instrumentor

lib/heroku/auth.rb

@@ -84,7 +84,7 @@ def password    # :nodoc:
 
     def api_key(user=get_credentials[0], password=get_credentials[1])
       @api ||= Heroku::API.new(default_params)
-      api_key = api.post_login(user, password).body["api_key"]
+      api_key = @api.post_login(user, password).body["api_key"]
       @api = nil
       api_key
     rescue Heroku::API::Errors::Forbidden => e
@@ -216,10 +216,7 @@ def ask_for_credentials
 
     def ask_for_second_factor
       $stderr.print "Two-factor code: "
-      second_factor = ask
-      params = default_params
-      params[:headers].merge!("Heroku-Two-Factor-Code" => second_factor)
-      @api = Heroku::API.new(params)
+      @api.second_factor = ask
     end
 
     def preauth