Merge pull request '캔 충전로직 수정' (#12) from test into main

Reviewed-on: #12

src/main/kotlin/kr/co/vividnext/sodalive/member/Member.kt

@@ -89,18 +89,18 @@ data class Member(
     fun charge(chargeCan: Int, rewardCan: Int, container: String) {
         when (container) {
             "ios" -> {
-                appleChargeCan = chargeCan
-                appleRewardCan = rewardCan
+                appleChargeCan += chargeCan
+                appleRewardCan += rewardCan
             }
 
             "aos" -> {
-                googleChargeCan = chargeCan
-                googleRewardCan = rewardCan
+                googleChargeCan += chargeCan
+                googleRewardCan += rewardCan
             }
 
             else -> {
-                pgChargeCan = chargeCan
-                pgRewardCan = rewardCan
+                pgChargeCan += chargeCan
+                pgRewardCan += rewardCan
             }
         }
     }