Yes, create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
As you mentioned, the site has not bad results via gtmetrix. Where and when do you face the slow connection? Describe the problem in more detail.
