1. Login to your Wordpress Content Management System admin page.
2. Navigate to Users > All Users.
3. Select the user you want to change the password by clicking on its username.
4. Scroll down on the page until you see the New Password and Repeat New Password field.
5. Input your new password in these 2 fields and click Update Profile button at the bottom of the page.
6. You may need to re-login again after this.