First go to your profile page. You have two options for this via the menu on the left or use the profile option in the top right menu.
Then get to the password tab.
On this page you must do 3 things, first fill the Old password with your current password, then fill the New password and Verify new password fields with the new password you want to be using.
You can see what you have written by holding the eye icon.
When you are happy with your new password, click Change password to save your changes.
If you have any problem or difficulties, please do not hesitate to contact the platform's team.