update auth services.

PSManagement.Api/Controllers/Authentication/AuthenticationController.cs

-using Microsoft.AspNetCore.Http;
+using FluentResults;
 using Microsoft.AspNetCore.Mvc;
 using PSManagement.Application.Contracts.Authentication;
 using PSManagement.Contracts.Authentication;
-using PSManagement.SharedKernel.Utilities;
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Threading.Tasks;
 using AuthenticationResponse = PSManagement.Contracts.Authentication.AuthenticationResponse;
 
@@ -36,7 +32,7 @@ namespace PSManagement.Api.Controllers.Authentication
                 return Ok(response);
             }
 
-            return Problem(title:"An Errorr Occured",detail:result.Error.Name,statusCode:400);
+            return Problem(title: result.Reasons[0].Message,detail:result.Errors[0].Message,statusCode:400);
         }
         [HttpPost("Register")]
         public async Task<IActionResult> Register([FromBody]  RegisterRequest registerRequest)
@@ -59,7 +55,7 @@ namespace PSManagement.Api.Controllers.Authentication
                 return Ok(response);
             }
 
-            return Problem(title: "An Errorr Occured", detail: result.Error.Name, statusCode: 400);
+            return Problem(title: "An Errorr Occured "+result.Errors[0].Message , detail: result.Reasons[0].Message, statusCode: 400);
         }
 
     }

PSManagement.Application/Contracts/Authentication/IAuthenticationService.cs

-using PSManagement.SharedKernel.Utilities;
+//using PSManagement.SharedKernel.Utilities;
+using FluentResults;
 using System;
 using System.Threading.Tasks;
 

PSManagement.Infrastructure/Services/Authentication/AuthenticationService.cs

-using PSManagement.Application.Contracts.Authentication;
+using FluentResults;
+using PSManagement.Application.Contracts.Authentication;
 using PSManagement.Application.Contracts.Authorization;
-using PSManagement.SharedKernel.Utilities;
+//using PSManagement.SharedKernel.Utilities;
 using System;
 using System.Threading.Tasks;
 
@@ -21,24 +22,23 @@ namespace PSManagement.Infrastructure.Services.Authentication
             
             User u = await _userRepository.GetByEmail(email);
             if (u is null || u.Password != password) {
-                return Result.Failure<AuthenticationResult>(new Error("404", "the password or email maybe wrong!."));
+                return Result.Fail<AuthenticationResult>(new Error( "the password or email maybe wrong!."));
 
             }
             String token = _jwtTokenGenerator.GenerateToken(u.Id,u.FirstName,u.LastName,u.Email);
             
-            return Result.Success<AuthenticationResult>(
-                        new AuthenticationResult {
-                        Id = u.Id,
-                        Email=u.Email,
-                        FirstName=u.FirstName,
-                        LastName =u.LastName,
-                        Token=token});
+            return  new AuthenticationResult {
+                       Id = u.Id,
+                       Email=u.Email,
+                       FirstName=u.FirstName,
+                       LastName =u.LastName,
+                       Token=token};
         }
         public async Task<Result<AuthenticationResult>> Register(String email, String firstName, String lastName, String password) {
             // check if the user exist 
             var u = await _userRepository.GetByEmail(email);
             if (u is not null) {
-                return Result.Failure<AuthenticationResult>(new Error("404","the user already exist "));
+                return Result.Fail<AuthenticationResult>(new Error("the user already exist "));
             }
             await _userRepository.AddAsync(
                 new User{
@@ -49,7 +49,7 @@ namespace PSManagement.Infrastructure.Services.Authentication
                 });
             // generate token 
             String token = _jwtTokenGenerator.GenerateToken(2322323,firstName,lastName,email);
-            return Result.Success<AuthenticationResult>(
+            return Result.Ok<AuthenticationResult>(
             new AuthenticationResult
             {
                 Id = 233233,

PSManagement.SharedKernel/PSManagement.SharedKernel.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="FluentResults" Version="3.16.0" />
     <PackageReference Include="MediatR" Version="5.1.0" />
   </ItemGroup>