Index: iknow-api/Repository/Implementations/RefreshTokenRepository.cs
===================================================================
--- iknow-api/Repository/Implementations/RefreshTokenRepository.cs	(revision 10009b9505124c201c365c19c07a9df40b091035)
+++ iknow-api/Repository/Implementations/RefreshTokenRepository.cs	(revision 10009b9505124c201c365c19c07a9df40b091035)
@@ -0,0 +1,49 @@
+using iknow_api.Models;
+using iknow_api.Data;
+using iknow_api.Models;
+using Microsoft.EntityFrameworkCore;
+using iknow_api.Services;
+using iknow_api.DTOs;
+using System.Runtime.CompilerServices;
+
+namespace iknow_api.Repositories
+{
+    public class RefreshTokenRepository : IRefreshTokenRepository
+    {
+        private readonly AppDbContext _context;
+
+        public RefreshTokenRepository(AppDbContext context)
+        {
+            _context = context;
+        }
+        
+        public async Task AddTokenAsync(RefreshToken refreshToken)
+        {
+             _context.RefreshToken.Add(refreshToken);
+            await _context.SaveChangesAsync();
+        }
+
+        public Task<bool> DeleteTokenAsync(string refreshTokenDto)
+        {
+            throw new NotImplementedException();
+        }
+
+        public async Task<int?> GetUserId(string refreshTokenDto)
+        {
+            var token = await _context.RefreshToken.FirstOrDefaultAsync(u => u.Token == refreshTokenDto);
+            return token?.UserId ;
+        }
+
+        public async Task<bool> VerifyTokenAsync(VerifyRefreshTokenDto refreshTokenDto)
+        {
+            var token = await _context.RefreshToken
+                .FirstOrDefaultAsync(rt =>
+                    rt.Token == refreshTokenDto.token &&
+                    rt.IsValid &&
+                    rt.ExpiresAt > DateTime.UtcNow);
+
+            return token != null;
+        }
+
+    }
+}