If you're logged into your Mioola account, you can change your password from your Settings (left main menu) > Account OR Profile icon (top right) > Settings icon (under your profile username) > Account page.
From there:
1. Click/Tap Change Password in the "Account Password" box.
2. Type your current and new passwords.
3. Click/Tap Change Password again.
If you've forgotten your password and need to reset it, learn how.