public override void ProcessSignInRequest(Scope scope, HttpContextBase httpContext)
{
string localAuthorityRealm = realmFormat
.Replace("{tenantId}", tenantId)
.Replace("{appPrincipalId}", appPrincipalId);
RequestAuthentication(httpContext, this.Issuer.Url.ToString(), localAuthorityRealm, this.MultiProtocolIssuer.ReplyUrl.ToString());
}