feat：增加用户资产和会员状态

utils/time.go

@@ -66,3 +66,8 @@ func DiffTimeMonth(time1, time2 time.Time) int {
 	month := math.Abs(float64(time1.Month()) - float64(time2.Month()))
 	return int(year)*12 + int(month) + 1
 }
+
+func DiffTimeDays(time1, time2 time.Time) int {
+	sub := time1.Sub(time2)
+	return int(math.Ceil(math.Abs(sub.Hours() / 24.0)))
+}