diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/MySQLAuthHandler.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/MySQLAuthHandler.java
index 0cdde91d..41d65110 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/MySQLAuthHandler.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/MySQLAuthHandler.java
@@ -8,6 +8,7 @@
 import java.util.UUID;
 
 import ru.gravit.launchserver.auth.MySQLSourceConfig;
+import ru.gravit.utils.helper.LogHelper;
 
 public final class MySQLAuthHandler extends CachedAuthHandler {
     private MySQLSourceConfig mySQLHolder;
@@ -25,6 +26,13 @@ public final class MySQLAuthHandler extends CachedAuthHandler {
     @Override
     public void init()
     {
+        //Verify
+        if(mySQLHolder == null) LogHelper.error("[Verify][AuthHandler] mySQLHolder cannot be null");
+        if(uuidColumn == null) LogHelper.error("[Verify][AuthHandler] uuidColumn cannot be null");
+        if(usernameColumn == null) LogHelper.error("[Verify][AuthHandler] usernameColumn cannot be null");
+        if(accessTokenColumn == null) LogHelper.error("[Verify][AuthHandler] accessTokenColumn cannot be null");
+        if(serverIDColumn == null) LogHelper.error("[Verify][AuthHandler] serverIDColumn cannot be null");
+        if(table == null) LogHelper.error("[Verify][AuthHandler] table cannot be null");
         // Prepare SQL queries
         queryByUUIDSQL = String.format("SELECT %s, %s, %s, %s FROM %s WHERE %s=? LIMIT 1",
                 uuidColumn, usernameColumn, accessTokenColumn, serverIDColumn, table, uuidColumn);
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/MySQLAuthProvider.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/MySQLAuthProvider.java
index b3554bd5..9f2dcdb0 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/MySQLAuthProvider.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/MySQLAuthProvider.java
@@ -9,6 +9,7 @@
 import ru.gravit.launchserver.auth.AuthException;
 import ru.gravit.launchserver.auth.MySQLSourceConfig;
 import ru.gravit.utils.helper.CommonHelper;
+import ru.gravit.utils.helper.LogHelper;
 import ru.gravit.utils.helper.SecurityHelper;
 
 public final class MySQLAuthProvider extends AuthProvider {
@@ -18,6 +19,13 @@ public final class MySQLAuthProvider extends AuthProvider {
     private String[] queryParams;
     private boolean usePermission;
 
+    @Override
+    public void init() {
+        if(query == null) LogHelper.error("[Verify][AuthProvider] query cannot be null");
+        if(message == null) LogHelper.error("[Verify][AuthProvider] message cannot be null");
+        if(mySQLHolder == null) LogHelper.error("[Verify][AuthProvider] mySQLHolder cannot be null");
+    }
+
     @Override
     public AuthProviderResult auth(String login, String password, String ip) throws SQLException, AuthException {
         Connection c = mySQLHolder.getConnection();
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RequestAuthProvider.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RequestAuthProvider.java
index 0d5a10c2..917ca21e 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RequestAuthProvider.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RequestAuthProvider.java
@@ -8,6 +8,7 @@
 import ru.gravit.launcher.ClientPermissions;
 import ru.gravit.utils.helper.CommonHelper;
 import ru.gravit.utils.helper.IOHelper;
+import ru.gravit.utils.helper.LogHelper;
 import ru.gravit.utils.helper.SecurityHelper;
 
 public final class RequestAuthProvider extends AuthProvider {
@@ -19,6 +20,8 @@ public final class RequestAuthProvider extends AuthProvider {
     @Override
     public void init()
     {
+        if(url == null) LogHelper.error("[Verify][AuthProvider] url cannot be null");
+        if(response == null) LogHelper.error("[Verify][AuthProvider] response cannot be null");
         pattern = Pattern.compile(response);
     }