We don't have a way to change your password in the app. What you can however do is reset your password. How you do this, is explained below.
If you're already logged in, start by signing out. To do this, click your user icon at the top right and then select "Sign out" to logout and end up on the login page:
Reset your password
On the login page, click "Forgot your password?" and enter your email address:
You will receive an email with a link that will bring you to a page where you can reset your password.