Subscription Enhancement #182
Description
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Issue Summary
In the contributors page, any email can be entered in order to subscribe, which is not feasible also it would be better to add an alert when a new subscriber enters
Actual Results
Any random email that does not exist is being accepted for subscription, also better to add an alert when subscribed.
Expected Results
Better to add and customize so that it accepts only the existing emails and also an alert message on subscribing.