To change the access password to your cPanel or FTP of your hosting plan, follow the following steps:
Enter your client area: https://clientes.atlanticadigital.net/clientarea.php
Enter the Menu: Services -> My Services
Select the service you want to access and modify the access code to your Cpane by clicking on it and then select "Change Password" from the menu that you can see in the left column.
When choosing a more memorable password, one that is difficult to obtain/guess, intersperse letters with numbers and add some capital letters in between.