public IEnumerable <Claim> GetCustomClaims()
        {
            var claims = new List <Claim>
            {
                new Claim(InternalClaims.Pseudonym, Pseudonym)
            };

            NationalIdentifier.MatchSome(x => claims.Add(new Claim(InternalClaims.NationalIdentifier, x)));

            if (IsPinVerified)
            {
                claims.Add(new Claim(InternalClaims.PinVerified, "true"));
            }

            return(claims);
        }