1. If the customer knows the email address and password they used to create the account in your CS-Cart store, then they can update this my going to My Account --> Profile Details. 
   
   
2. If the customer has access to the original email address for their account, but forgot their password, then they can change their email address and password as follows:
1. Go to the following password reset URL:
   https://www.yourdomain.com/index.php?dispatch=auth.recover_password
   Note: yourdomain.com should be replaced with your domain name.
   After entering their email address and submitting the form, it will send them a link that will allow them to update their email and password details.
   
   
3. If the customer does not have access to the original email address for their account, then the following steps will apply:
   1. They will need to provide you with their new email address
   2. You will need to edit their customer record, entering the new email address
   3. Then they can change their password using the following password reset URL:
      https://www.yourdomain.com/index.php?dispatch=auth.recover_password
      Note: yourdomain.com should be replaced with your domain name.
   4. After entering their email address and submitting the form, it will send them a link that will allow them to update their password details.