package Ġapp . l unch time . core . security Ċ Ċ import Ġorg . springframework . data . mongodb . repository . Reactive Mongo Repository Ċ import Ġreactor . core . publisher . Mono Ċ Ċ interface ĠCredential Repository Ġ: ĠReactive Mongo Repository < Credential , ĠString > Ġ{ ĊĠĠĠ Ġfun ĠfindBy Email ( email : ĠString ): ĠMono < Credential > Ċ Ċ }