chzzk followdate error handler add

src/main/kotlin/space/mori/chzzk_bot/chzzk/MessageHandler.kt

@@ -143,7 +143,9 @@ class MessageHandler(
         }
 
         result = followPattern.replace(result) {
+            try {
                 val following = getFollowDate(listener.chatId, msg.userId)
+
                 val dateString: String = following.content.streamingProperty.following?.followDate ?: SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(
                     Date()
                 )
@@ -155,6 +157,10 @@ class MessageHandler(
 
                 val period = Period.between(pastDate, today)
                 period.days.toString()
+            } catch (e: Exception) {
+                logger.info(e.message)
+                return@replace "0"
+            }
         }
 
         result = counterPattern.replace(result) {