add AccountService

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

@@ -0,0 +1,19 @@
+package ltd.lulz.service
+
+import io.github.oshai.kotlinlogging.KotlinLogging
+import ltd.lulz.model.AccountEntity
+import ltd.lulz.repository.AccountRepository
+import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+
+private val log = KotlinLogging.logger {}
+
+@Service
+class AccountService(
+    private val accountRepository: AccountRepository,
+) {
+
+    fun create(entity: AccountEntity): Mono<AccountEntity> = accountRepository
+        .save(entity)
+        .doOnNext { log.debug { "account created with id: ${it.id}" } }
+}