Changing how the password work.

-> Now the export file will not export the password hashes.

-> On the import if you provide a password in plain text, this password will be encrypted and can be used by the user.

-> If you don't provide a password, if the user already existed in the environment, it will use the old password.

**IMPORTANT**

After the importing is done, the excel file is kept.
In case you used it to create passwords, theplain text values will still be there.
To avoid security issues, make sure to remove the excel files by running the timer DeleteOld.

Another good practice is to ask the users to change their password after the first access.