public async Task SendForgotPasswordEmail(string emailAddress, string subject, CancellationToken cancellationToken = default(CancellationToken))
{
EnsureSettings();
var identityEntity = await this.AuthenticationProvider.GetIdentityByEmail(emailAddress).ConfigureAwait(false);
var verificationToken = await this.AuthenticationProvider.GenerateVerificationToken(identityEntity.IdentityId);
var verificationTokenLink = this.ForgotPasswordRedirectUri.AbsoluteUri + verificationToken;
var content = this.ForgotPasswordEmailTemplate;
content = content.Replace("##__Subject__##", subject);
content = content.Replace("##__CompanyName__##", this.CompanyName);
content = content.Replace("##__VerificationTokenLink__##", verificationTokenLink);
await MailgunClient.SendEmail(this.FromEmail, emailAddress, subject, content, cancellationToken);
}