How do I use a redis URI to connect

[ConjecturDev]

Hey guys thanks for all the good work. I am trying to connect to a Heroku Redis server using the provide URI but I am getting back an error. I am using the following:

redis.connect(redis://username:paswword@host:port)

But this just gives me back the following error:

lua: /usr/local/share/lua/5.2/redis.lua:380: redis error: NOAUTH Authentication required

Is it not possible to use the URI, or is there another way I should be trying to connect using the URI's provided data.