fix certficates group request
fix certficates group request

be-oi/beoi-contest-platform,France-ioi/bebras-platform,be-oi/beoi-contest-platform,be-oi/beoi-contest-platform,France-ioi/bebras-platform,France-ioi/bebras-platform,be-oi/beoi-contest-platform,be-oi/beoi-contest-platform,France-ioi/bebras-platform,France-ioi/bebras-platform,be-oi/beoi-contest-platform,France-ioi/bebras-platform