If you don't have a StableForm account allready (username/password) you can create one when launching the StableForm app.
Fill in the registration page in the StableForm app:
Passwords require at least 1 number, at least 1 lowercase letter and at least 1 uppercase letter they should also be at least 6 characters long.
First and Last names need to be at least 2 characters long.
Once you've filled in the form and none of the text fields have a red border (indicating they're not valid), press the Sign Up button to create your account.
After your account is created you will be logged into the app (but there won't be much to see at this stage), next, proceed to setting up the app.