You can change your password on the settings window on your Koinal account.
Please login to your account and then;
✔ Click on the arrow on the right top and next to your profile picture.
✔ Choose the "Account Settings" option in the pop-up window to reach the "change password" window.
✔ Enter your current password & the new password and confirm it.
✔ Please save the update before leaving the window.