package Ġcom . mir on 4 dev . sandbox . jwt . repository Ċ Ċ import Ġcom . mir on 4 dev . sandbox . jwt . model . User Ċ import Ġorg . springframework . data . repository . Paging And Sorting Repository Ċ Ċ interface ĠUser Repository Ġ: ĠP aging And Sorting Repository < User , ĠLong > Ġ{ ĊĊĠĠĠ Ġfun Ġexists By AccountId ( accountId : ĠLong ): ĠBoolean Ċ } Ċ