When you go to hub.catenda.com/signin you will be presented with this page:
Here you can insert your email address and and password and click on sign in.
After successfully signing in you will be redirected to the projects page.
If you have MFA enabled you will be redirected to a page where you put in your MFA code.
If you have lost or forgotten your code please contact support with the support bubble on this page or at firstname.lastname@example.org
Enter your email address here to reset your password.
If you do not receive an email within 2 minutes please contact support with the support bubble on this page or at email@example.com
Click here to sign up.
Keep in mind that in order to join a project it is always better to follow the email invitation link than to make a new free account.