/**
* A Web of Trust identity.
*/
-open class DefaultIdentity(private val id: String, private val nickname: String, private val requestUri: String) : Identity {
+open class DefaultIdentity(private val id: String, private val nickname: String?, private val requestUri: String) : Identity {
private val contexts = mutableSetOf<String>().synchronized()
private val properties = mutableMapOf<String, String>().synchronized()