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 89fd5b4..da2daa4 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
@@ -54,7 +54,7 @@ fun Routing.apiCommandRoutes() {
                 return@put
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@put
             }
@@ -84,7 +84,7 @@ fun Routing.apiCommandRoutes() {
                 return@post
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@post
             }
@@ -119,7 +119,7 @@ fun Routing.apiCommandRoutes() {
                 return@delete
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && 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 e225a31..f1ddb57 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
@@ -29,7 +29,7 @@ fun Route.apiDiscordRoutes() {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@get
             }
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@get
             }
@@ -58,7 +58,7 @@ fun Route.apiDiscordRoutes() {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@post
             }
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && 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 939a06f..c3a8829 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
@@ -116,8 +116,8 @@ fun Routing.apiRoutes() {
                 songConfig.streamerOnly,
                 songConfig.disabled
             ))
-
-            returnUsers.addAll(user.subordinates.map {
+            val subordinates = user.subordinates ?: emptyList()
+            returnUsers.addAll(subordinates.map {
                 val subStatus = user.token?.let { it1 -> getStreamInfo(it1) }
                 return@map if (it.token == null || subStatus?.content == null) {
                     null
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..26fbe86 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
@@ -27,7 +27,7 @@ fun Routing.apiTimerRoutes() {
                 return@get
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@get
             }
@@ -51,7 +51,7 @@ fun Routing.apiTimerRoutes() {
                 return@put
             }
 
-            if(!user.managers.any { it.naverId == session?.id } && user.naverId != session?.id) {
+            if(!user.managers?.any { it.naverId == session?.id }!! ?: true && user.naverId != session?.id) {
                 call.respond(HttpStatusCode.BadRequest, "User does not exist")
                 return@put
             }