I'm trying to setup coder with the aws template, stucked with external auth(github)

I deployed coder on aws ec2 by using aws template, it's up and running, now I want to be able to create workspace from github repo, I tried to setup the external auth, it's not very clear, like where exactly put the config, the env, if I can get a example main.tf file would be really help, and right now I configured as the screenshot, when I click build, it shows: Error during the build external auth provider "primary-github" is not configured how to solve this, I setted up github app, and installed, will this be all? Thank you.