diff --git a/api/pom.xml b/api/pom.xml
index b84a3bf..9f01c02 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.artformgames</groupId>
         <artifactId>artcore-parent</artifactId>
-        <version>1.1.0</version>
+        <version>1.1.1</version>
     </parent>
     <properties>
         <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
diff --git a/api/src/main/java/com/artformgames/core/ArtCore.java b/api/src/main/java/com/artformgames/core/ArtCore.java
index 5cac826..38ba5c0 100644
--- a/api/src/main/java/com/artformgames/core/ArtCore.java
+++ b/api/src/main/java/com/artformgames/core/ArtCore.java
@@ -15,6 +15,10 @@
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.Plugin;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Optional;
+import java.util.UUID;
 
 public class ArtCore {
 
@@ -56,6 +60,13 @@ public static User getUser(@NotNull Player player) {
         return getUser(player).getHandler(handler);
     }
 
+    public static <T extends UserHandler> @Nullable T getHandler(@NotNull UUID playerUUID,
+                                                                 @NotNull Class<T> handler) {
+        return Optional.ofNullable(getUserManager().get(playerUUID))
+                .map(user -> user.getNullableHandler(handler))
+                .orElse(null);
+    }
+
     public static BungeeChannelApi getBungeeAPI() {
         return plugin().getBungeeAPI();
     }
diff --git a/api/src/main/java/com/artformgames/core/user/UserKey.java b/api/src/main/java/com/artformgames/core/user/UserKey.java
index 1e379f5..e9e157d 100644
--- a/api/src/main/java/com/artformgames/core/user/UserKey.java
+++ b/api/src/main/java/com/artformgames/core/user/UserKey.java
@@ -32,12 +32,6 @@ public boolean isInstance(KeyType type, Object param) {
         };
     }
 
-    public Map<String, String> toMap() {
-        String jsonValue = GSON.toJson(this);
-        return Arrays.stream(KeyType.values())
-                .collect(Collectors.toMap(this::getValue, value -> jsonValue, (a, b) -> b));
-    }
-
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
diff --git a/api/src/main/java/com/artformgames/core/user/manager/UserKeyManager.java b/api/src/main/java/com/artformgames/core/user/manager/UserKeyManager.java
index ed780cd..37e186a 100644
--- a/api/src/main/java/com/artformgames/core/user/manager/UserKeyManager.java
+++ b/api/src/main/java/com/artformgames/core/user/manager/UserKeyManager.java
@@ -9,6 +9,7 @@
 
 public interface UserKeyManager {
 
+    UserKey upsertKey(@NotNull UUID userUUID, @NotNull String username) throws Exception;
 
     @Nullable UserKey getKey(UserKey.KeyType type, Object param);
 
diff --git a/plugin/pom.xml b/plugin/pom.xml
index 073710d..55a045a 100644
--- a/plugin/pom.xml
+++ b/plugin/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.artformgames</groupId>
         <artifactId>artcore-parent</artifactId>
-        <version>1.1.0</version>
+        <version>1.1.1</version>
     </parent>
     <properties>
         <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
diff --git a/plugin/src/main/java/com/artformgames/core/user/BukkitUserManager.java b/plugin/src/main/java/com/artformgames/core/user/BukkitUserManager.java
index 3a2e2b2..2e25d71 100644
--- a/plugin/src/main/java/com/artformgames/core/user/BukkitUserManager.java
+++ b/plugin/src/main/java/com/artformgames/core/user/BukkitUserManager.java
@@ -131,6 +131,12 @@ public Map<UUID, BukkitUser> getUsersMap() {
         return users;
     }
 
+    public UserKey upsertKey(@NotNull UUID uuid, @NotNull String username) throws Exception {
+        Long id = upsertID(uuid, username);
+        if (id == null || id <= 0) throw new Exception("Unable to get " + username + "'s uid.");
+        return new UserKey(id, uuid, username);
+    }
+
     public Long upsertID(@NotNull UUID uuid, @NotNull String username) throws Exception {
         long id = -1;
         String cachedName = null;
@@ -152,7 +158,7 @@ public Long upsertID(@NotNull UUID uuid, @NotNull String username) throws Except
                         .addColumnValue(UserKey.KeyType.NAME.getColumnName(), username)
                         .addCondition("id", id)
                         .build().execute((e, a) -> {
-                            getLogger().severe("更新用户 " + username + " 的用户名失败！");
+                            getLogger().severe("Failed to update " + username + "'s username!");
                             e.printStackTrace();
                         });
             }
@@ -163,16 +169,16 @@ public Long upsertID(@NotNull UUID uuid, @NotNull String username) throws Except
                         .setColumnNames(UserKey.KeyType.UUID.getColumnName(), UserKey.KeyType.NAME.getColumnName())
                         .setParams(uuid, username).returnGeneratedKey(Long.class).execute();
             } catch (SQLException e) {
-                getLogger().severe("创建新用户 " + username + " 失败！");
+                getLogger().severe("Failed to create " + username + "'s account!");
                 return null;
             }
         }
     }
 
     public BukkitUser createUser(@NotNull UUID userUUID, @NotNull String username) throws Exception {
-        Long id = upsertID(userUUID, username);
-        if (id == null || id <= 0) throw new Exception("无法获取用户 " + username + " 的UID！");
-        return new BukkitUser(this, new UserKey(id, userUUID, username));
+        UserKey key = upsertKey(userUUID, username);
+        if (key == null) throw new Exception("Unable to fetch " + username + "'s key.");
+        return new BukkitUser(this, key);
     }
 
     @NotNull
diff --git a/pom.xml b/pom.xml
index f65f1e4..751f7d5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
     </properties>
     <groupId>com.artformgames</groupId>
     <artifactId>artcore-parent</artifactId>
-    <version>1.1.0</version>
+    <version>1.1.1</version>
 
     <name>ArtCore</name>
     <description>