diff --git a/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/chzzk/ChzzkHandler.kt b/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/chzzk/ChzzkHandler.kt
index e4e15b7..5bffa10 100644
--- a/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/chzzk/ChzzkHandler.kt
+++ b/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/chzzk/ChzzkHandler.kt
@@ -7,10 +7,8 @@ import kotlinx.coroutines.launch
 import org.koin.java.KoinJavaComponent.inject
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
-import space.mori.chzzk_bot.chatbot.chzzk.Connector.client as ChzzkClient
 import space.mori.chzzk_bot.chatbot.chzzk.Connector.getChannel
 import space.mori.chzzk_bot.chatbot.discord.Discord
-import space.mori.chzzk_bot.chatbot.utils.refreshAccessToken
 import space.mori.chzzk_bot.common.events.*
 import space.mori.chzzk_bot.common.models.User
 import space.mori.chzzk_bot.common.services.LiveStatusService
@@ -217,20 +215,28 @@ class UserHandler(
         if(user?.accessToken == null || user.refreshToken == null) {
             throw RuntimeException("AccessToken or RefreshToken is not valid.")
         }
+        try {
 
-        val tokens = ChzzkClient.refreshAccessToken(user.refreshToken!!)
+            client = Connector.getClient(user.accessToken!!, user.refreshToken!!)
 
-        client = Connector.getClient(tokens.first, tokens.second)
-        listener = ChzzkSessionBuilder(client).buildUserSession()
+            client.loginAsync().join()
+            client.refreshTokenAsync().join()
 
-        UserService.setRefreshToken(user, tokens.first, tokens.second)
+            UserService.setRefreshToken(user, client.loginResult.accessToken(), client.loginResult.refreshToken())
 
-        listener.createAndConnectAsync().join()
+            listener = ChzzkSessionBuilder(client).buildUserSession()
 
-        listener.on(SessionChatMessageEvent::class.java) {
-            messageHandler.handle(it.message, user)
+            listener.createAndConnectAsync().join()
+
+            messageHandler = MessageHandler(this@UserHandler)
+
+            listener.on(SessionChatMessageEvent::class.java) {
+                messageHandler.handle(it.message, user)
+            }
+        } catch(e: Exception) {
+            logger.error("Exception(${user.username}): ${e.stackTraceToString()}")
+            throw RuntimeException("Exception: ${e.stackTraceToString()}")
         }
-        messageHandler = MessageHandler(this@UserHandler)
     }
 
     internal fun disable() {
diff --git a/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/utils/accessTokenRefresh.kt b/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/utils/accessTokenRefresh.kt
deleted file mode 100644
index c8eb9ac..0000000
--- a/chatbot/src/main/kotlin/space/mori/chzzk_bot/chatbot/utils/accessTokenRefresh.kt
+++ /dev/null
@@ -1,55 +0,0 @@
-package space.mori.chzzk_bot.chatbot.utils
-
-import com.google.gson.Gson
-import okhttp3.OkHttpClient
-import okhttp3.Request
-import okhttp3.RequestBody.Companion.toRequestBody
-import space.mori.chzzk_bot.common.utils.client
-import xyz.r2turntrue.chzzk4j.ChzzkClient
-import java.io.IOException
-
-val client = OkHttpClient.Builder()
-    .addNetworkInterceptor { chain ->
-        chain.proceed(
-            chain.request()
-                .newBuilder()
-                .header("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36")
-                .build()
-        )
-    }
-    .build()
-val gson = Gson()
-
-data class RefreshTokenResponse(
-    val accessToken: String,
-    val refreshToken: String,
-    val expiresIn: Int,
-    val tokenType: String = "Bearer",
-    val scope: String
-)
-
-fun ChzzkClient.refreshAccessToken(refreshToken: String): Pair<String, String> {
-    val url = "https://openapi.chzzk.naver.com/auth/v1/token"
-    val request = Request.Builder()
-        .url(url)
-        .header("Content-Type", "application/json")
-        .post(gson.toJson(mapOf(
-            "grantType" to "refresh_token",
-            "refreshToken" to refreshToken,
-            "clientId" to this.apiClientId,
-            "clientSecret" to this.apiSecret
-        )).toRequestBody())
-        .build()
-
-    client.newCall(request).execute().use { response ->
-        try {
-            if(!response.isSuccessful) throw IOException("Unexpected code ${response.code}")
-            val body = response.body?.string()
-            val data = gson.fromJson(body, RefreshTokenResponse::class.java)
-
-            return Pair(data.accessToken, data.refreshToken)
-        } catch(e: Exception) {
-            throw e
-        }
-    }
-}
\ No newline at end of file
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt
index e8f256f..cafa8d5 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt
@@ -199,7 +199,10 @@ val server = embeddedServer(Netty, port = 8080, ) {
                                 listOf()
                             )
                         )
-                        user?.let { UserService.setRefreshToken(it, tokenResponse.content.accessToken, tokenResponse.content.refreshToken ?: "") }
+                        user?.let { UserService.setRefreshToken(it,
+                            tokenResponse.content.accessToken,
+                            tokenResponse.content.refreshToken ?: ""
+                        ) }
                         call.respondRedirect(getFrontendURL(""))
                     }
                 } catch (e: Exception) {
@@ -427,4 +430,4 @@ suspend fun getChzzkUser(accessToken: String): ChzzkApi<ChzzkMeApi> {
 
 fun generateSecureRandomState(): String {
     return BigInteger(130, SecureRandom()).toString(32)
-}
\ No newline at end of file
+}
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiRoutes.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiRoutes.kt
index 4d40900..b178732 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiRoutes.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiRoutes.kt
@@ -40,12 +40,16 @@ fun Routing.apiRoutes() {
     val dispatcher: CoroutinesEventBus by inject(CoroutinesEventBus::class.java)
 
     suspend fun getChzzkUserWithId(uid: String): ChzzkUserReceiveEvent? {
-        val completableDeferred = CompletableDeferred< ChzzkUserReceiveEvent>()
+        val completableDeferred = CompletableDeferred<ChzzkUserReceiveEvent>()
+        dispatcher.subscribe(ChzzkUserReceiveEvent::class) { event ->
+            if (event.uid == uid) {
+                completableDeferred.complete(event)
+            }
+        }
         val user = withTimeoutOrNull(5000) {
             dispatcher.post(ChzzkUserFindEvent(uid))
             completableDeferred.await()
         }
-
         return user
     }