ProfileClaimsService.cs

	public class ProfileClaimsService<TUser> : IProfileService
		where TUser : class {

		private readonly IUserClaimsPrincipalFactory<TUser> _claimsFactory;
		private readonly UserManager<TUser> _userManager;

		public ProfileClaimsService(UserManager<TUser> userManager, IUserClaimsPrincipalFactory<TUser> claimsFactory) {
			_userManager = userManager;
			_claimsFactory = claimsFactory;
		}

		public async Task GetProfileDataAsync(ProfileDataRequestContext context) {
			var user = (await _userManager.GetUserAsync(context.Subject));
			var principal = await _claimsFactory.CreateAsync(user);

			var claims = principal.Claims.ToList();
			claims = claims.Where(claim => context.RequestedClaimTypes.Contains(claim.Type)).ToList();

			// Add custom claims in token here based on user properties or any other source
			var convertedUser = user as UserIdentity;
			var claims2 = new List<Claim> {
					new Claim(GivenName , convertedUser.FirstName),
					new Claim(FamilyName, convertedUser.Lastname),
					new Claim("fullname", convertedUser.FirstName + " " + convertedUser.Lastname),
				};


			claims.AddRange(claims2);

			context.IssuedClaims = claims;
		}

		public async Task IsActiveAsync(IsActiveContext context) {
			var user = await _userManager.GetUserAsync(context.Subject);

			context.IsActive = (user != null);
		}
	}