Enter your email and Coinfloor password and confirm the login with your 2FA code. You will be then be asked to set up a PIN for the application.
Once you have the PIN set up you will be able to access your account via the app using your PIN only, so you do not have to enter your email, password and 2FA code every time.
When you log out of the app or your log in expires after 30 days, you will be asked to set up the pin again when logging in. You can use the same pin again.