Hello Team, how can i do this right in kotlin ...

# getting-started

[opas90]

Hello Team,

how can i do this right in kotlin

fun getUserFromDB(id: Long): String? {}

cache.computeIfAbsent(agentId, { id -> getUserFromDB(agentId)})

it gives me an error since getUserFromDB has String? return type which can not be used with the supplied function

i am using a concurrentHashMap for cache