Enhancement Request: Send Invoice and acknowledgment email to the users during/before recurring the subscription.

[nabid-anzum]

Short Description: When a recurring pack is created and the customer buys it he gets the invoice. However, when the plan gets auto-renewed customer gets no invoice.

How to Reproduce:

• Create a recurring subscription pack.
• Enable invoice from here https://prnt.sc/veh2cz
• User will find the invoice on his account page
• When it gets auto-renewed after the subscription period is over customers get no invoice.

Current Behavior: It's not producing any invoice at the time of auto-renewals.

Expected Behavior:

• It should produce an invoice each time the subscription gets renewed.
• Admin will get an acknowledgment each time subscription gets renewed.
• It should also send an alert email to the user before the subscription gets auto-renewed like 'your subscription will be auto renewed after 7 days' or so.
• When the subscription will be auto renewed user will get an email with the invoice.

Video/screen-cast of the current scenario: https://drive.google.com/drive/folders/16km2BdPrnCoHc7UDA0QFi3GuhYvQUF9U

Note: This should be applicable for both free(Paypal) & pro(Stripe).