protected virtual async Task <IEnumerable <Claim> > GetClaimsFromAccount(TUser user)
        {
            var claims = new List <Claim> {
                new Claim(Constants.ClaimTypes.Subject, user.Id.ToString()),
                new Claim(Constants.ClaimTypes.PreferredUserName, user.UserName),
            };

            if (userManager.SupportsUserEmail)
            {
                var email = await userManager.GetEmailAsync(user.Id);

                if (!String.IsNullOrWhiteSpace(email))
                {
                    claims.Add(new Claim(Constants.ClaimTypes.Email, email));
                    var verified = await userManager.IsEmailConfirmedAsync(user.Id);

                    claims.Add(new Claim(Constants.ClaimTypes.EmailVerified, verified ? "true" : "false"));
                }
            }

            if (userManager.SupportsUserPhoneNumber)
            {
                var phone = await userManager.GetPhoneNumberAsync(user.Id);

                if (!String.IsNullOrWhiteSpace(phone))
                {
                    claims.Add(new Claim(Constants.ClaimTypes.PhoneNumber, phone));
                    var verified = await userManager.IsPhoneNumberConfirmedAsync(user.Id);

                    claims.Add(new Claim(Constants.ClaimTypes.PhoneNumberVerified, verified ? "true" : "false"));
                }
            }

            if (userManager.SupportsUserClaim)
            {
                claims.AddRange(await userManager.GetClaimsAsync(user.Id));
            }

            if (userManager.SupportsUserRole)
            {
                var roleClaims =
                    from role in await userManager.GetRolesAsync(user.Id)
                    select new Claim(Constants.ClaimTypes.Role, role);

                claims.AddRange(roleClaims);
            }

            return(claims);
        }