diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
index bf2d8e88..1a460e15 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
@@ -32,6 +32,7 @@
 import ru.gravit.launchserver.manangers.SessionManager;
 import ru.gravit.launchserver.response.Response;
 import ru.gravit.launchserver.socket.ServerSocketHandler;
+import ru.gravit.launchserver.texture.RequestTextureProvider;
 import ru.gravit.launchserver.texture.TextureProvider;
 import ru.gravit.utils.helper.*;
 
@@ -60,7 +61,7 @@ public static final class Config {
 
         // Handlers & Providers
 
-        public AuthHandler[] authHandler;
+        public AuthHandler  authHandler;
 
         public AuthProvider[] authProvider;
 
@@ -127,6 +128,18 @@ public void setAddress(String address) {
 
         public void verify() {
             VerifyHelper.verify(getAddress(), VerifyHelper.NOT_EMPTY, "LaunchServer address can't be empty");
+            if(authHandler == null)
+            {
+                throw new NullPointerException("AuthHandler must not be null");
+            }
+            if(authProvider == null || authProvider[0] == null)
+            {
+                throw new NullPointerException("AuthProvider must not be null");
+            }
+            if(textureProvider == null)
+            {
+                throw new NullPointerException("TextureProvider must not be null");
+            }
         }
     }
 
@@ -392,7 +405,7 @@ public void close() {
 
         // Close handlers & providers
         try {
-            for (AuthHandler h : config.authHandler) h.close();
+            config.authHandler.close();
         } catch (IOException e) {
             LogHelper.error(e);
         }
@@ -423,9 +436,11 @@ private void generateConfigIfNotExists() throws IOException {
         newConfig.launch4j = new ExeConf();
         newConfig.buildPostTransform = new PostBuildTransformConf();
         newConfig.env = LauncherConfig.LauncherEnvironment.STD;
-        newConfig.authHandler = new AuthHandler[]{new MemoryAuthHandler()};
+        newConfig.authHandler = new MemoryAuthHandler();
         newConfig.hwidHandler = new AcceptHWIDHandler();
-        newConfig.authProvider = new AuthProvider[]{new RejectAuthProvider()};
+
+        newConfig.authProvider = new AuthProvider[]{new RejectAuthProvider("Технические работы")};
+        newConfig.textureProvider = new RequestTextureProvider("http://example.com/skins/%username%.png","http://example.com/cloaks/%username%.png");
         newConfig.port = 7420;
         newConfig.bindAddress = "0.0.0.0";
         //try (BufferedReader reader = IOHelper.newReader(IOHelper.getResourceURL("ru/gravit/launchserver/defaults/config.cfg"))) {
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/CachedAuthHandler.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/CachedAuthHandler.java
index 5e91d3b4..fa7c4805 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/CachedAuthHandler.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/CachedAuthHandler.java
@@ -29,10 +29,8 @@ public Entry(UUID uuid, String username, String accessToken, String serverID) {
             this.serverID = serverID == null ? null : VerifyHelper.verifyServerID(serverID);
         }
     }
-    @Expose(serialize = false, deserialize = false)
-    private final Map<UUID, Entry> entryCache = new HashMap<>(1024);
-    @Expose(serialize = false, deserialize = false)
-    private final Map<String, UUID> usernamesCache = new HashMap<>(1024);
+    private transient final Map<UUID, Entry> entryCache = new HashMap<>(1024);
+    private transient final Map<String, UUID> usernamesCache = new HashMap<>(1024);
 
 
     protected void addEntry(Entry entry) {
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/AuthProvider.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/AuthProvider.java
index 9ab4a4ce..6580cd74 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/AuthProvider.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/AuthProvider.java
@@ -1,5 +1,6 @@
 package ru.gravit.launchserver.auth.provider;
 
+import com.google.gson.annotations.Expose;
 import ru.gravit.launchserver.LaunchServer;
 import ru.gravit.launchserver.auth.AuthException;
 import ru.gravit.launchserver.auth.handler.AuthHandler;
@@ -13,7 +14,7 @@
 public abstract class AuthProvider implements AutoCloseable {
     private static final Map<String, Class> AUTH_PROVIDERS = new ConcurrentHashMap<>(8);
     private static boolean registredProv = false;
-    private LaunchServer server;
+    private transient LaunchServer server = LaunchServer.server;
 
 
     public static AuthProviderResult authError(String message) throws AuthException {
@@ -33,7 +34,7 @@ public static void registerProviders() {
             registerProvider("reject", RejectAuthProvider.class);
 
             // Auth providers that doesn't do nothing :D
-            registerProvider("com.mojang", MojangAuthProvider.class);
+            registerProvider("mojang", MojangAuthProvider.class);
             registerProvider("mysql", MySQLAuthProvider.class);
             registerProvider("request", RequestAuthProvider.class);
             registerProvider("json", JsonAuthProvider.class);
@@ -42,7 +43,7 @@ public static void registerProviders() {
     }
 
     public AuthHandler getAccociateHandler(int this_position) {
-        return server.config.authHandler[0];
+        return server.config.authHandler;
     }
 
 
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RejectAuthProvider.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RejectAuthProvider.java
index 836d5e79..7d63c51a 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RejectAuthProvider.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/RejectAuthProvider.java
@@ -2,6 +2,13 @@
 
 import ru.gravit.launchserver.auth.AuthException;
 public final class RejectAuthProvider extends AuthProvider {
+    public RejectAuthProvider() {
+    }
+
+    public RejectAuthProvider(String message) {
+        this.message = message;
+    }
+
     private String message;
 
     @Override
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UUIDToUsernameCommand.java b/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UUIDToUsernameCommand.java
index 49dc4d47..918a5e7f 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UUIDToUsernameCommand.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UUIDToUsernameCommand.java
@@ -29,7 +29,7 @@ public void invoke(String... args) throws CommandException, IOException {
         UUID uuid = parseUUID(args[0]);
 
         // Get UUID by username
-        String username = server.config.authHandler[0].uuidToUsername(uuid);
+        String username = server.config.authHandler.uuidToUsername(uuid);
         if (username == null)
             throw new CommandException("Unknown UUID: " + uuid);
 
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UsernameToUUIDCommand.java b/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UsernameToUUIDCommand.java
index eca96027..24d226ac 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UsernameToUUIDCommand.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/command/auth/UsernameToUUIDCommand.java
@@ -29,7 +29,7 @@ public void invoke(String... args) throws CommandException, IOException {
         String username = parseUsername(args[0]);
 
         // Get UUID by username
-        UUID uuid = server.config.authHandler[0].usernameToUUID(username);
+        UUID uuid = server.config.authHandler.usernameToUUID(username);
         if (uuid == null)
             throw new CommandException(String.format("Unknown username: '%s'", username));
 
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/AuthResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/AuthResponse.java
index ec2e3e3b..9987d5a2 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/AuthResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/AuthResponse.java
@@ -107,7 +107,7 @@ public void reply() throws Exception {
         // Authenticate on server (and get UUID)
         UUID uuid;
         try {
-            uuid = provider.getAccociateHandler(auth_id).auth(result);
+            uuid = server.config.authHandler.auth(result);
         } catch (AuthException e) {
             requestError(e.getMessage());
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/CheckServerResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/CheckServerResponse.java
index c2ceec31..3ad7d1cf 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/CheckServerResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/CheckServerResponse.java
@@ -31,7 +31,7 @@ public void reply() throws IOException {
         // Try check server with auth handler
         UUID uuid;
         try {
-            uuid = server.config.authHandler[0].checkServer(username, serverID);
+            uuid = server.config.authHandler.checkServer(username, serverID);
         } catch (AuthException e) {
             requestError(e.getMessage());
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/JoinServerResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/JoinServerResponse.java
index a6f0b426..8ae04ec4 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/JoinServerResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/response/auth/JoinServerResponse.java
@@ -28,7 +28,7 @@ public void reply() throws IOException {
         debug("Username: '%s', Access token: %s, Server ID: %s", username, accessToken, serverID);
         boolean success;
         try {
-            success = server.config.authHandler[0].joinServer(username, accessToken, serverID);
+            success = server.config.authHandler.joinServer(username, accessToken, serverID);
         } catch (AuthException e) {
             requestError(e.getMessage());
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUUIDResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUUIDResponse.java
index 9147c4c0..0aeeca44 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUUIDResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUUIDResponse.java
@@ -47,7 +47,7 @@ public void reply() throws IOException {
         debug("UUID: " + uuid);
         String client = input.readString(SerializeLimits.MAX_CLIENT);
         // Verify has such profile
-        String username = server.config.authHandler[0].uuidToUsername(uuid);
+        String username = server.config.authHandler.uuidToUsername(uuid);
         if (username == null) {
             output.writeBoolean(false);
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUsernameResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUsernameResponse.java
index eae95e7c..859ada26 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUsernameResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/response/profile/ProfileByUsernameResponse.java
@@ -13,7 +13,7 @@
 public final class ProfileByUsernameResponse extends Response {
 
     public static void writeProfile(LaunchServer server, HOutput output, String username, String client) throws IOException {
-        UUID uuid = server.config.authHandler[0].usernameToUUID(username);
+        UUID uuid = server.config.authHandler.usernameToUUID(username);
         if (uuid == null) {
             output.writeBoolean(false);
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/CheckServerResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/CheckServerResponse.java
index 1e740a7e..c88c8486 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/CheckServerResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/CheckServerResponse.java
@@ -20,7 +20,7 @@ public String getType() {
     @Override
     public void execute(WebSocketService service, ChannelHandlerContext ctx, Client client) throws Exception {
         try {
-            LaunchServer.server.config.authHandler[0].checkServer(username, serverID);
+            LaunchServer.server.config.authHandler.checkServer(username, serverID);
         } catch (AuthException e) {
             service.sendObject(ctx, new WebSocketService.ErrorResult(e.getMessage()));
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/JoinServerResponse.java b/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/JoinServerResponse.java
index b9a5b502..0ece3b78 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/JoinServerResponse.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/socket/websocket/json/auth/JoinServerResponse.java
@@ -22,7 +22,7 @@ public String getType() {
     public void execute(WebSocketService service, ChannelHandlerContext ctx, Client client) throws Exception {
         boolean success;
         try {
-            success = LaunchServer.server.config.authHandler[0].joinServer(username, accessToken, serverID);
+            success = LaunchServer.server.config.authHandler.joinServer(username, accessToken, serverID);
         } catch (AuthException e) {
             service.sendObject(ctx, new WebSocketService.ErrorResult(e.getMessage()));
             return;
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/texture/RequestTextureProvider.java b/LaunchServer/src/main/java/ru/gravit/launchserver/texture/RequestTextureProvider.java
index 39cb3dd0..55859b52 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/texture/RequestTextureProvider.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/texture/RequestTextureProvider.java
@@ -11,8 +11,16 @@
 import java.util.UUID;
 
 public final class RequestTextureProvider extends TextureProvider {
+    public RequestTextureProvider() {
+    }
+
     private static final UUID ZERO_UUID = new UUID(0, 0);
 
+    public RequestTextureProvider(String skinURL, String cloakURL) {
+        this.skinURL = skinURL;
+        this.cloakURL = cloakURL;
+    }
+
     private static Texture getTexture(String url, boolean cloak) throws IOException {
         LogHelper.debug("Getting texture: '%s'", url);
         try {
diff --git a/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java b/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java
index 3d96d21b..6f30ed9c 100644
--- a/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java
+++ b/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java
@@ -1,5 +1,6 @@
 package ru.gravit.launcher;
 
+import com.google.gson.GsonBuilder;
 import ru.gravit.launcher.client.*;
 import ru.gravit.launcher.gui.choosebox.CheckComboBox;
 import ru.gravit.launcher.gui.choosebox.CheckComboBoxSkin;
@@ -130,6 +131,7 @@ public static void main(String... args) throws Throwable {
         LogHelper.printVersion("Launcher");
         LogHelper.printLicense("Launcher");
         // Start Launcher
+        initGson();
         Instant start = Instant.now();
         try {
             new LauncherEngine().start(args);
@@ -141,6 +143,13 @@ public static void main(String... args) throws Throwable {
         LogHelper.debug("Launcher started in %dms", Duration.between(start, end).toMillis());
     }
 
+    public static void initGson()
+    {
+        if(Launcher.gson != null) return;
+        Launcher.gsonBuilder = new GsonBuilder();
+        Launcher.gson = Launcher.gsonBuilder.create();
+    }
+
     // Instance
     private final AtomicBoolean started = new AtomicBoolean(false);
 
diff --git a/Launcher/src/main/java/ru/gravit/launcher/client/ClientLauncher.java b/Launcher/src/main/java/ru/gravit/launcher/client/ClientLauncher.java
index 51ab3e29..1994075d 100644
--- a/Launcher/src/main/java/ru/gravit/launcher/client/ClientLauncher.java
+++ b/Launcher/src/main/java/ru/gravit/launcher/client/ClientLauncher.java
@@ -1,6 +1,7 @@
 package ru.gravit.launcher.client;
 
 import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import com.google.gson.JsonObject;
 import ru.gravit.launcher.*;
 import ru.gravit.launcher.hasher.DirWatcher;
@@ -400,6 +401,7 @@ public static Process launch(
     public static void main(String... args) throws Throwable {
         Launcher.modulesManager = new ClientModuleManager(null);
         LauncherConfig.getAutogenConfig().initModules(); //INIT
+        initGson();
         LauncherEngine engine = LauncherEngine.clientInstance();
         engine.loadScript(Launcher.API_SCRIPT_FILE);
         engine.loadScript(Launcher.CONFIG_SCRIPT_FILE);
@@ -536,6 +538,13 @@ private static LinkedList<Path> resolveClassPathList(Path clientDir, String... c
         return result;
     }
 
+    public static void initGson()
+    {
+        if(Launcher.gson != null) return;
+        Launcher.gsonBuilder = new GsonBuilder();
+        Launcher.gson = Launcher.gsonBuilder.create();
+    }
+
     @LauncherAPI
     public static void setProfile(ClientProfile profile) {
         Launcher.profile = profile;