diff --git a/common/src/main/kotlin/space/mori/chzzk_bot/common/services/UserService.kt b/common/src/main/kotlin/space/mori/chzzk_bot/common/services/UserService.kt
index 05896eb..67df6af 100644
--- a/common/src/main/kotlin/space/mori/chzzk_bot/common/services/UserService.kt
+++ b/common/src/main/kotlin/space/mori/chzzk_bot/common/services/UserService.kt
@@ -1,7 +1,6 @@
 package space.mori.chzzk_bot.common.services
 
 import org.jetbrains.exposed.dao.load
-import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
 import org.jetbrains.exposed.sql.transactions.transaction
 import space.mori.chzzk_bot.common.models.User
 import space.mori.chzzk_bot.common.models.Users
@@ -35,7 +34,7 @@ object UserService {
 
     fun getUser(id: Int): User? {
         return transaction {
-            val user = User.findById(id)
+            val user = User.find{ Users.id eq id }.firstOrNull()
             user?.load(User::subordinates, User::managers)
             user
         }
@@ -43,9 +42,7 @@ object UserService {
 
     fun getUser(discordID: Long): User? {
         return transaction {
-            val users = User.find(Users.discord eq discordID)
-
-            val user = users.firstOrNull()
+            val user = User.find{ Users.discord eq discordID }.firstOrNull()
             user?.load(User::subordinates, User::managers)
             user
         }
@@ -53,9 +50,7 @@ object UserService {
 
     fun getUser(chzzkID: String): User? {
         return transaction {
-            val users = User.find(Users.token eq chzzkID)
-
-            val user = users.firstOrNull()
+            val user = User.find{ Users.token eq chzzkID }.firstOrNull()
             user?.load(User::subordinates, User::managers)
             user
         }
@@ -63,9 +58,7 @@ object UserService {
 
     fun getUserWithGuildId(discordGuildId: Long): User? {
         return transaction {
-            val users = User.find(Users.liveAlertGuild eq discordGuildId)
-
-            val user = users.firstOrNull()
+            val user = User.find { Users.liveAlertGuild eq discordGuildId }.firstOrNull()
             user?.load(User::subordinates, User::managers)
             user
         }
@@ -73,9 +66,7 @@ object UserService {
 
     fun getUserWithNaverId(naverId: String): User? {
         return transaction {
-            val users = User.find(Users.naverId eq naverId)
-
-            val user = users.firstOrNull()
+            val user = User.find{ Users.naverId eq naverId }.firstOrNull()
             user?.load(User::subordinates, User::managers)
             user
         }
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiCommandRoutes.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiCommandRoutes.kt
index ab7bcc2..c6d3dad 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiCommandRoutes.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiCommandRoutes.kt
@@ -10,6 +10,7 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.transactions.transaction
 import org.koin.java.KoinJavaComponent.inject
 import space.mori.chzzk_bot.common.events.CommandReloadEvent
 import space.mori.chzzk_bot.common.events.CoroutinesEventBus
@@ -54,7 +55,10 @@ fun Routing.apiCommandRoutes() {
                 return@put
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@put
             }
@@ -84,7 +88,10 @@ fun Routing.apiCommandRoutes() {
                 return@post
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@post
             }
@@ -119,7 +126,10 @@ fun Routing.apiCommandRoutes() {
                 return@delete
             }
 
-            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@delete
             }
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiDiscordRoutes.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiDiscordRoutes.kt
index f1ddb57..a08c4b7 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiDiscordRoutes.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiDiscordRoutes.kt
@@ -7,6 +7,7 @@ import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import io.ktor.server.sessions.*
 import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.transactions.transaction
 import org.koin.java.KoinJavaComponent.inject
 import space.mori.chzzk_bot.common.events.CoroutinesEventBus
 import space.mori.chzzk_bot.common.services.UserService
@@ -29,7 +30,11 @@ fun Route.apiDiscordRoutes() {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@get
             }
-            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
+
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@get
             }
@@ -58,7 +63,11 @@ fun Route.apiDiscordRoutes() {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@post
             }
-            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
+
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@post
             }
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 20aafbf..19b4ca8 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
@@ -10,6 +10,7 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.transactions.transaction
 import org.koin.java.KoinJavaComponent.inject
 import space.mori.chzzk_bot.common.events.CoroutinesEventBus
 import space.mori.chzzk_bot.common.events.UserRegisterEvent
@@ -18,7 +19,7 @@ import space.mori.chzzk_bot.common.services.UserService
 import space.mori.chzzk_bot.common.utils.getStreamInfo
 import space.mori.chzzk_bot.common.utils.getUserInfo
 import space.mori.chzzk_bot.webserver.UserSession
-import space.mori.chzzk_bot.webserver.utils.ChzzkUsercache
+import space.mori.chzzk_bot.webserver.utils.ChzzkUserCache
 
 @Serializable
 data class GetUserDTO(
@@ -68,8 +69,8 @@ fun Routing.apiRoutes() {
                 call.respondText("Require UID", status = HttpStatusCode.NotFound)
                 return@get
             }
-            val user = getStreamInfo(uid)
-            if(user.content == null) {
+            val user = ChzzkUserCache.getCachedUser(uid)
+            if(user?.content == null) {
                 call.respondText("User not found", status = HttpStatusCode.NotFound)
                 return@get
             } else {
@@ -117,10 +118,12 @@ fun Routing.apiRoutes() {
                 songConfig.streamerOnly,
                 songConfig.disabled
             ))
-            val subordinates = user.subordinates
-            println(subordinates)
+
+            val subordinates = transaction {
+                user.subordinates
+            }
             returnUsers.addAll(subordinates.map {
-                val subStatus = it.token?.let { token -> ChzzkUsercache.getCachedUser(token) }
+                val subStatus = it.token?.let { token -> ChzzkUserCache.getCachedUser(token) }
                 return@map if (it.token == null || subStatus?.content == null) {
                     null
                 } else {
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiTimerRoutes.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiTimerRoutes.kt
index c39c898..1526c66 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiTimerRoutes.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/routes/ApiTimerRoutes.kt
@@ -7,6 +7,7 @@ import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import io.ktor.server.sessions.*
 import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.transactions.transaction
 import space.mori.chzzk_bot.common.events.TimerType
 import space.mori.chzzk_bot.common.services.TimerConfigService
 import space.mori.chzzk_bot.common.services.UserService
@@ -27,7 +28,10 @@ fun Routing.apiTimerRoutes() {
                 return@get
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@get
             }
@@ -51,7 +55,10 @@ fun Routing.apiTimerRoutes() {
                 return@put
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            val managers = transaction {
+                user.managers
+            }
+            if(!managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@put
             }
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/ChzzkUserCache.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/ChzzkUserCache.kt
index ca6b479..225d6b8 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/ChzzkUserCache.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/ChzzkUserCache.kt
@@ -9,7 +9,7 @@ import space.mori.chzzk_bot.common.utils.getStreamInfo
 import java.time.Instant
 import java.util.concurrent.ConcurrentHashMap
 
-object ChzzkUsercache {
+object ChzzkUserCache {
     private val cache = ConcurrentHashMap<String, CachedUser>()
     private const val EXP_SECONDS = 600L
     private val mutex = Mutex()