Hi @erlend_sh, @derWalter, @freshfish, @faebser, we’ve set up a single-team test instance for GitLab Mattermost users to log in with GitLab.com account (authentication only available with GitLab.com account, no email/password sign-up–this is the default setup in a GitLab Mattermost deployment)
The goal for this is to get help test Mattermost v1.1 (shipping around 10/12) prior to its inclusion in GitLab 8.1 omnibus, which ships 10/22. We’d welcome issues filed in the GitLab Mattermost issue tracker.
A little later we want to open something up for email/password auth, this is just a starting point since we need to get a test environment up any way, might as well open this one up.
For those trying it out, please recognize that this is a test instance and have no expectation that history will be preserved after testing is complete.