fix in getcoupons swiftapi

@@ -341,7 +341,7 @@ public class swiftApi {
         CouponsDataModel().getCouponsData(getCouponsCallback)
         CouponsDataModel().getCouponsData(getCouponsCallback)
     }
     }
     
     
-    public func getCoupons() -> Array<CouponItemModel> {
+    public class func getCoupons() -> Array<CouponItemModel> {
         return CouponsDataModel().getData
         return CouponsDataModel().getData
     }
     }