Get start time rounded up to next 5 minutes

ChallengeService.php

$currentMinute = Carbon::parse($userStartTime)->startOfMinute();
        $diff = (int) $this->roundUpToAny($currentMinute->minute, 5) - $currentMinute->minute; // 50
        $additionalMinutes = (integer) $this->roundUpToAny(mt_rand(120, 360), 5);
        $start_time = $currentMinute->addMinutes($diff + $additionalMinutes);
        dd($start_time);