update AccountService with getById

src/main/kotlin/ltd/lulz/service/AccountService.kt

@@ -1,6 +1,7 @@
 package ltd.lulz.service
 
 import io.github.oshai.kotlinlogging.KotlinLogging
+import java.util.UUID
 import ltd.lulz.model.AccountEntity
 import ltd.lulz.repository.AccountRepository
 import org.springframework.stereotype.Service
@@ -16,4 +17,7 @@ class AccountService(
     fun create(entity: AccountEntity): Mono<AccountEntity> = accountRepository
         .save(entity)
         .doOnNext { log.debug { "account created with id: ${it.id}" } }
+
+    fun getById(id: UUID): Mono<AccountEntity> = accountRepository.findById(id)
+        .doOnNext { log.debug { "found account by id: ${it.id}" } }
 }