/// <summary>
/// Checks if authorization is mandatory on this field and if the user roles meet the field requirements.
/// Reports an error on any fail.
/// </summary>
private void CheckForAuthorization(Field field, FieldType fieldType, ValidationContext context, IUserContext <TUserId> userContext)
{
if (fieldType.RequiresRoles() && !fieldType.CanAccess(userContext.UserRoles))
{
context.ReportError(new ValidationError(
context.OriginalQuery,
"auth-required",
"You are not authorized to run this query.",
field));
}
}