add POST /user endpoints.

- POST /user {"chzzkUrl": String} to add chzzk account to bots.
- and it post event UserRegisterEvent

common/src/main/kotlin/space/mori/chzzk_bot/common/events/UserRegisterEvent.kt

@@ -0,0 +1,7 @@
+package space.mori.chzzk_bot.common.events
+
+data class UserRegisterEvent(
+    val chzzkId: String
+): Event {
+    val TAG = javaClass.simpleName
+}

common/src/main/kotlin/space/mori/chzzk_bot/common/services/UserService.kt

@@ -7,16 +7,31 @@ import space.mori.chzzk_bot.common.models.User
 import space.mori.chzzk_bot.common.models.Users
 
 object UserService {
-    fun saveUser(username: String, token: String, discordID: Long): User {
+    fun saveUser(username: String, naverId: String): User {
         return transaction {
             User.new {
                 this.username = username
-                this.token = token
-                this.discord = discordID
+                this.naverId = naverId
             }
         }
     }
 
+    fun updateUser(user: User, chzzkId: String, username: String): User {
+        return transaction {
+            user.token = chzzkId
+            user.username = username
+
+            user
+        }
+    }
+
+    fun updateUser(user: User, discordID: Long): User {
+        return transaction {
+            user.discord = discordID
+            user
+        }
+    }
+
     fun getUser(id: Int): User? {
         return transaction {
             User.findById(id)