diff --git a/CleanArchitecture/CleanArchitecture.Application/Constants/CustomClimTypes.cs b/CleanArchitecture/CleanArchitecture.Application/Constants/CustomClimTypes.cs
new file mode 100644
index 0000000..935e117
--- /dev/null
+++ b/CleanArchitecture/CleanArchitecture.Application/Constants/CustomClimTypes.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CleanArchitecture.Application.Constants
+{
+    public static class CustomClaimTypes
+    {
+        public const string Uid = "Uid";
+    }
+}
diff --git a/CleanArchitecture/CleanArchitecture.Application/Models/Identity/AuthResponse.cs b/CleanArchitecture/CleanArchitecture.Application/Models/Identity/AuthResponse.cs
index f85e5b6..be8cc81 100644
--- a/CleanArchitecture/CleanArchitecture.Application/Models/Identity/AuthResponse.cs
+++ b/CleanArchitecture/CleanArchitecture.Application/Models/Identity/AuthResponse.cs
@@ -2,7 +2,7 @@
 {
     public class AuthResponse
     {
-        public string Id { get; set; } = string.Empty;
+        public string UserId { get; set; } = string.Empty;
         public string Username { get; set; } = string.Empty;
         public string Email { get; set; }  = string.Empty;
         public string Token { get; set; } = string.Empty;
diff --git a/CleanArchitecture/CleanArchitecture.Application/Models/Identity/JwtSettings.cs b/CleanArchitecture/CleanArchitecture.Application/Models/Identity/JwtSettings.cs
index 25fa665..fabadfb 100644
--- a/CleanArchitecture/CleanArchitecture.Application/Models/Identity/JwtSettings.cs
+++ b/CleanArchitecture/CleanArchitecture.Application/Models/Identity/JwtSettings.cs
@@ -6,6 +6,6 @@ namespace CleanArchitecture.Application.Models.Identity
         public string Key { get; set; } = string.Empty;
         public string Issuer { get; set; } = string.Empty;
         public string Audience { get; set; } = string.Empty;
-        public double DuracionInMinutes { get; set; }
+        public double DurationInMinutes { get; set; }
     }
 }
diff --git a/CleanArchitecture/CleanArchitecture.Identity/Services/AuthService.cs b/CleanArchitecture/CleanArchitecture.Identity/Services/AuthService.cs
new file mode 100644
index 0000000..34c3e8a
--- /dev/null
+++ b/CleanArchitecture/CleanArchitecture.Identity/Services/AuthService.cs
@@ -0,0 +1,119 @@
+using CleanArchitecture.Application.Constants;
+using CleanArchitecture.Application.Contracts.Identity;
+using CleanArchitecture.Application.Models.Identity;
+using CleanArchitecture.Identity.Models;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.IdentityModel.Tokens;
+using Newtonsoft.Json.Linq;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+
+namespace CleanArchitecture.Identity.Services
+{
+    public class AuthService : IAuthService
+    {
+        private readonly UserManager<ApplicationUser> userManager;
+        private readonly SignInManager<ApplicationUser> signInManager;
+        private readonly JwtSettings jwtSettings;
+        public AuthService(UserManager<ApplicationUser> _userManager, SignInManager<ApplicationUser> _signInManager, JwtSettings _jwtSettings)
+        {
+            userManager = _userManager;
+            signInManager = _signInManager;
+            jwtSettings = _jwtSettings;
+        }
+
+
+        public async Task<AuthResponse> Login(AuthRequest request)
+        {
+            var user = await userManager.FindByEmailAsync(request.Email);
+            if (user == null)
+            {
+                throw new Exception($"User with email: {request.Email} does not exist");
+            }
+
+            var result = await signInManager.CheckPasswordSignInAsync(user, request.Password, false);
+            if (!result.Succeeded)
+            {
+                throw new Exception("Invalid Login Attempt");
+            }
+            var token = await GenerateToken(user);
+            var authResponse = new AuthResponse
+            {
+                UserId = user.Id,
+                Token = new JwtSecurityTokenHandler().WriteToken(token),
+                Email = user.Email!,
+                Username = user.UserName!
+            };
+            return authResponse;
+        }
+
+        public async Task<RegistrationResponse> Register(RegistrationRequest request)
+        {
+            var existingUser = await userManager.FindByEmailAsync(request.Email);
+            if (existingUser != null)
+            {
+                throw new Exception($"User with email: {request.Email} already exists");
+            }
+            var existingEmail = await userManager.FindByEmailAsync(request.Email);
+            if (existingEmail != null)
+            {
+                throw new Exception($"Email: {request.Email} is already in use");
+            }
+            var newUser = new ApplicationUser
+            {
+                Nombre = request.Nombre,
+                Apellidos = request.Apellidos,
+                Email = request.Email,
+                UserName = request.Username
+            };
+            var result = await userManager.CreateAsync(newUser, request.Password);
+            if (!result.Succeeded)
+            {
+                var errors = string.Empty;
+                foreach (var error in result.Errors)
+                {
+                    errors += $"{error.Description}, ";
+                }
+                throw new Exception($"User Registration has failed: {errors}");
+            }
+            var token = await GenerateToken(newUser);
+            var registrationResponse = new RegistrationResponse
+            {
+                UserId = newUser.Id,
+                Email = newUser.Email,                
+                Token = new JwtSecurityTokenHandler().WriteToken(token),
+                Username = newUser.UserName
+            };
+            return registrationResponse;
+        }
+
+        private async Task<JwtSecurityToken> GenerateToken(ApplicationUser user)
+        {
+            var userClaims = await userManager.GetClaimsAsync(user);
+            var roles = await userManager.GetRolesAsync(user);
+            var roleClaims = roles.Select(role => new Claim(ClaimTypes.Role, role));
+
+            var claims = new[]
+            {
+                new Claim(JwtRegisteredClaimNames.Sub, user.UserName!),
+                new Claim(JwtRegisteredClaimNames.Email, user.Email!),
+                new Claim(CustomClaimTypes.Uid, user.Id),
+            }.Union(userClaims).Union(roleClaims);
+
+            var symmetricSecurityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtSettings.Key));
+            var signingCredentials = new SigningCredentials(symmetricSecurityKey, SecurityAlgorithms.HmacSha256);
+
+            var token = new JwtSecurityToken(
+                    issuer: jwtSettings.Issuer,
+                    audience: jwtSettings.Audience,
+                    claims: claims,
+                    notBefore: DateTime.UtcNow,
+                    expires: DateTime.UtcNow.AddMinutes(jwtSettings.DurationInMinutes),
+                    signingCredentials: signingCredentials);
+                          
+            return token;
+                                                                                                      
+        }
+    }
+}