I can't log into the app, what should I do?

How annoying that this is not working. We have listed some steps to still log into the app.
-Make sure you have a working internet connection;
-In the app, you will see an error message, indicating whether the account does exist
-If you have an existing account at this email address, we recommend you request a new password

- Check if there is an update for the app in the App Store.
- Is this the case? Update the app to the latest version and log in again.
- Close the app completely and try again. 
- Does this not work? Then delete the app completely from your phone and download the app again.
- If this doesn't work either, request a new password.