src/main/java/com/example/g8backend/service/ISigningService.java

package com.example.g8backend.service;

import com.example.g8backend.dto.ApiResponse;
import com.example.g8backend.entity.UserSignin;

import java.time.LocalDate;
import java.util.List;

public interface ISigningService {
    boolean signIn(Long userId);
    List<UserSignin> getSigninsByDateRange(Long userId, LocalDate startDate, LocalDate endDate);
}