Your organisation has decided to log in via Single Sign-On (SSO). This means that by means of an external application you can log in at 12Build and no longer log in the regular way. This can be done with a Google account or with a Microsoft account.
In the login screen you can choose 'Login with Microsoft (Azure)' or 'Login with Google'. This may vary per organization and (sub) administrators within your organization may be able to tell you more about it. Do you not know who this is/are? You can always email us at firstname.lastname@example.org. Then we can check this for you.