AddClaims method for GitHub Auth

AddClaims

        private static void AddClaims(OAuthCreatingTicketContext context, JObject user)
        {
            var identifier = user.Value<string>("id");
            if (!string.IsNullOrEmpty(identifier))
            {
                context.Identity.AddClaim(new Claim(
                    ClaimTypes.NameIdentifier, identifier,
                    ClaimValueTypes.String, context.Options.ClaimsIssuer));
            }

            var userName = user.Value<string>("login");
            if (!string.IsNullOrEmpty(userName))
            {
                context.Identity.AddClaim(new Claim(
                    ClaimsIdentity.DefaultNameClaimType, userName,
                    ClaimValueTypes.String, context.Options.ClaimsIssuer));
            }

            var name = user.Value<string>("name");
            if (!string.IsNullOrEmpty(name))
            {
                context.Identity.AddClaim(new Claim(
                    "urn:github:name", name,
                    ClaimValueTypes.String, context.Options.ClaimsIssuer));
            }

            var link = user.Value<string>("url");
            if (!string.IsNullOrEmpty(link))
            {
                context.Identity.AddClaim(new Claim(
                    "urn:github:url", link,
                    ClaimValueTypes.String, context.Options.ClaimsIssuer));
            }
        }