Corma supports 2 SSO providers as of today as the only way to login. Both methods are available on all pricing plans.

Go to app.corma.io
Click "Sign in with Google"
Select your Google account and authorize access
You will be redirected to your Corma workspace
Use your organization Google account, not a personal one.
Go to app.corma.io
Click "Sign in with Microsoft"
Select your Microsoft account and authorize access
You will be redirected to your Corma workspace
Use your organization Microsoft account, not a personal one.
If you don't have an account yet, click "Sign up" at the bottom of the login page, or ask your workspace admin to invite you.