some changes

api/src/Controllers/StudentController.cs

@@ -19,6 +19,14 @@ public class StudentController : BaseController
     [ProducesResponseType(typeof(ResponseResult<IEnumerable<StudentResponse>>), StatusCodes.Status200OK)]
     public async Task<ActionResult<ResponseResult<IEnumerable<StudentResponse>>>> GetAll()
     {
+
+        var (userId, email, programId, role, error) = GetProgramUserFromClaims();
+
+        if (error is not null)
+        {
+            return error;
+        }
+
         var students = await _studentRepository.GetAllAsync();
         var response = students.Select(StudentResponse.FromDatabaseModel);
 

api/src/DataAccess/Repositories/AuthRepository.cs

@@ -19,7 +19,7 @@ public class AuthRepository
         string? userAgent)
     {
         using var db = Connection;
-        var result = await db.QuerySingleOrDefaultAsync<string?>(
+        var result = await db.QuerySingleOrDefaultAsync<Guid?>(
             "sp_RefreshToken_Create",
             new
             {
@@ -33,7 +33,7 @@ public class AuthRepository
                 p_user_agent = userAgent
             },
             commandType: CommandType.StoredProcedure);
-        return result != null ? Guid.Parse(result) : null;
+        return result;
     }
 
     public async Task<dbRefreshToken?> GetRefreshTokenByIdAsync(Guid refreshTokenId)