Open the app and press 'Login'.
Then log in with your password and username.

A code will be sent to you by email. You must enter this code to log in.
After entering the code, press again 'Login'.

The following steps only occur when you use the Happi app for the first time:

You must now consent to the terms and conditions.

When you consent to the privacy conditions, a new screen will open. You must scroll all the way to the bottom to give permission.
The same applies to the terms of use. Then press 'Next step'.

Check your personal data. Most of it has already been filled in because you have created an account. Fill in the missing information and press 'Continue'.
Indicate what you want to use the app for.
You now have to enter a code. You will use this code in the future to open the part you have chosen. Each part asks for a security code.
A code is required for each component in the Happi app. So when you open an item for the first time, you will be asked to enter a new security code.

There is also the option to use Face ID or a Fingerprint if your device supports this.
After you have completed these steps you are logged in. You will now be given the option to press the 'Prepare Profile' button to complete the final steps.
After this, the app is ready for use.