Harry Styles begins his record 10-show “Together, Together” residency at the Johan Cruijff ArenA on Saturday, the first of a series running through June 5, with many tickets for later dates still available on Ticketmaster and some resold at nearly half price. Dutch railway operator NS is urging fans attending three of the concerts to arrange alternative transportation due to track maintenance that will reduce train service to Amsterdam Bijlmer ArenA station.