Have the possibility to display the user password

No. Pressero does not store the actual plain text passwords of site users, but stores a hash of the password that is calculated using various values. It is not possible to retrieve user plain text passwords from any site. It is therefore not possible to know this data. We do not store this information in plain text - it is encrypted.  
As an alternative, perhaps you can send your users a link to the lost password page. The link would be your site's domain followed by "/lostpassword" (without the quotes). Since it is likely that the user will not remember the password set when the account was created, they will need to reset it before logging into the site.