GitLab.com resolved the issue at 1:22 PDT. Pulumi.com logins for GitLab are now expected to succeed.
Posted Mar 18, 2019 - 13:55 PDT
At 1:06 PM PDT, we detected that GitLab.com is experiencing a partial service disruption, causing some Pulumi login attempts for GitLab users to fail. We are monitoring Pulumi.com closely for issues related to this.