removed not required column “Method” from Refill Coupons index view.
moved DB query for Refill Coupons index to the Refillcoupons model and
added join on accounts table to get missing username column.
changed route name from user.pin.recharge to user.recharge for
recharges from userPanel.
added option to choose between prepaid/refill coupons and implemented
the same in UserController.