value is always returning null

[utills]

code
fun storeCredentials(value: String) {
val cache = Cache.Builder<String, String>().build()
cache.put(KeyConstant.userCredentials, value)
val value = cache.get(KeyConstant.userCredentials)
print(value)
}

fun retrieveCredentials(): String? {
    val cache = Cache.Builder<String, String>().build()
    val creds = cache.get(KeyConstant.userCredentials)
    return creds
}

[hoc081098]

You have created many Cache instances per method calls.
2 those methods must access the same Cache instance.

private val cache = ...
fun store() = cache.put(...)
fun retrieve() = cache.get(...)