protected override Task <Uri> GenerateAuthorizeUriAsync(HttpContext httpContext, Guid stateIdentifier)
{
NullGuard.NotNull(httpContext, nameof(httpContext));
IGetAuthorizeUriForMicrosoftGraphQuery query = new GetAuthorizeUriForMicrosoftGraphQuery(GetRedirectUriForMicrosoftGraph(httpContext.Request), stateIdentifier);
return(QueryBus.QueryAsync <IGetAuthorizeUriForMicrosoftGraphQuery, Uri>(query));
}