add Spring Data

src/main/java/ru/dmitriymx/plugin/service/BannedUserService.java

@@ -0,0 +1,25 @@
+package ru.dmitriymx.plugin.service;
+
+import org.bukkit.entity.Player;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import ru.dmitriymx.plugin.repository.BannedUserRepository;
+
+@Service
+public class BannedUserService {
+
+	private final BannedUserRepository repository;
+
+	@Autowired
+	public BannedUserService(BannedUserRepository repository) {
+		this.repository = repository;
+	}
+
+	public boolean inBanned(Player player) {
+		return inBanned(player.getName());
+	}
+
+	public boolean inBanned(String playerName) {
+		return repository.findByPlayerName(playerName.toLowerCase()).isPresent();
+	}
+}