package Ġm ingle . ch ang . api . interfaces Ċ Ċ import Ġm ingle . ch ang . api . entities . User Ċ import Ġorg . springframework . data . jpa . repository . Jpa Repository Ċ Ċ interface ĠUser Res pository Ġ: ĠJ pa Repository < User , ĠString > Ġ{ ĊĠĠĠ Ġfun Ġexists By Account ( account : ĠString ) Ġ: ĠBoolean ĊĊĠĠĠ Ġfun Ġfind First By Account And Password ( account : ĠString , Ġpassword : ĠString ): ĠUser ? Ċ }