Even if i'm late. October Cms don't come with built-in user login, so you need do install one, the default from OctoberCms staff or others as Lovata Buddies. But you can write your own, or extend one and use the first SSO of wuethrich44/flarum-ext-sso to take the sample website code example to implement pure php login to flarum. But you need a little bit of understanding of Octobercms to.
