generate jwt token authorize(roles = admin ) not working .net core 403

// Get User roles and add them to claims
                var roles = await _userManager.GetRolesAsync(user);
                AddRolesToClaims(claims, roles);

// ===== Token =====
        private async Task<object> GenerateJwtToken(User user)
        {
            var claims = new List<Claim>
            {
                new Claim(JwtRegisteredClaimNames.Sub, user.UserName),
                new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
                new Claim(ClaimTypes.NameIdentifier, user.Id),
            };

            // Get User roles and add them to claims
            var roles = await _userManager.GetRolesAsync(user);
            AddRolesToClaims(claims, roles);

            var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["JwtKey"]));
            var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
            var expires = DateTime.Now.AddDays(Convert.ToDouble(_configuration["JwtExpireDays"]));

            var token = new JwtSecurityToken(
                _configuration["JwtIssuer"],
                _configuration["JwtIssuer"],
                claims,
                expires: expires,
                signingCredentials: creds
            );

            return new JwtSecurityTokenHandler().WriteToken(token);
        }


        private void AddRolesToClaims(List<Claim> claims, IEnumerable<string> roles)
        {
            foreach (var role in roles)
            {
                var roleClaim = new Claim(ClaimTypes.Role, role);
                claims.Add(roleClaim);
            }
        }

var claims = new List<Claim>
            {
                new Claim(JwtRegisteredClaimNames.Sub, user.UserName),
                new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
                new Claim(ClaimTypes.NameIdentifier, user.Id),
                new Claim(ClaimTypes.Role,"The Role Of the logged in user, you can get from your DB")
            };