Tap on your profile photo in the upper left corner.
Tap the Settings tab, which has a gear icon to its left.
Tap Change Password.
Tap the text box under Current Password to type in your account’s current password.
Tap the text box under New Password to type in the new password that you’d like to use for your account.
Tap the text box under Confirm New Password to verify your account’s new password.
Tap the red CHANGE PASSWORD button at the bottom center of the screen to officially change your password.