Users and groups are used to delegate and control email notifications and access to data. One or more than one groups can be assigned to a category. Only users assigned to category will be able to see
data under that category
For example, if user A was created under group X and, group X was assigned to Category Passports, User A will only be able to see category Passports when he logs in. Also, he will receive
notifications pertaining to that specific category only.