Creating issue comments with Auth token requires private repo permission

[geekodour]

Firebase Github Auth is used to enable insite commenting for github comments, but the auth provider needs repo scope to create an issue comment, i.e a post comment on the site.
A repo scope in asks for private repo access.
We don't need private repo access of the user, we just need the user to be able to comment on the repo of the author of the blog.
What kind of permissions can we use here?

[geekodour]

#74