You may be required to change the existing password due to certain reasons. You can simply log in to the Brella attendee web app and change the account password.
How to change the password
Go to next.brella.io
Click on your display image
Select account settings
Select "Password"
Change your password
Click save to add the changes
You are not allowed to change the password via the mobile app. It can be done only via the web app.