Fix tabcomplete

src/main/java/fr/xephi/authme/command/TabCompleteHandler.java

@@ -0,0 +1,17 @@
+package fr.xephi.authme.command;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collections;
+import java.util.List;
+
+public class TabCompleteHandler implements TabCompleter {
+
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        return Collections.emptyList();
+    }
+}