On the website
moscow.netizenhostels.com/en in the search bar, select "NETIZEN in Moscow", the desired dates of stay and click on the magnifying glass sign. After going to the reservation page, select the number of guests, click "I have a promotional code" and enter
cyclingcongress2020. You will see a list of available options with a discount. Promotional code is valid for the dates of stay from 31st of March to 5th of April.