By Sean Walsh & Ben Jacobs Kylian Mbappe must inform PSG president Nasser Al-Khelaifi first on his decision over his future as part of an agreement with the French champions, 90min understands. Mbappe’s contract at PSG expires at the end of the 2023/24 season but he and his camp have insisted he has not yet decided whether to stay at Parc des Princes or leave this summer. 90min reported last week PSG were relaxed over the situation as they would not be out of pocket even if the forward leaves on a free transfer due to a legal agreement that could see him hand back up to €80m in bonuses. Having…