You can change your password from your phone app in the Menu tab.
By selecting the Menu tab in your app, you will see your profile where you are able to edit and update your personal details, and select Account.
From here, and you will be able to change your password to whatever you like.
Just try not to forget what you change it to! (Don't worry, if you DO forget, we have a support article here that can help with that as well. We got you covered.)