Here's how you can change your password:

• If you're unable to log in, simply visit the login page and tap "Forgotten Password". You'll then receive an email to change your password. If you need help with how to do this, click here.
• If you are currently logged in:
  • Visit your profile
  • Tap the 3 lined icon in the top right of the screen
  • Go to settings > Account Details > Password
  • Type in your new password and click "Save Changes"