New users have to click on the signup icon on www.tattara.com or click on this link https://app.tattara.com/#/sign-up to sign up for free. This takes you to this signup page that requires you put in your username, email, full-name and password like shown in the image below.
You have to check your email or spam for the verification link after registering,
This is a picture of the email you will receive.
After clicking on "Verify Email", you will be redirected to this page
Afterwards, you will be able to login to begin your projects, this is a screenshot of the login page. You can either login with your email or username.