core/com.tealium.prism.core.api.settings/CoreSettingsBuilder/setVisitorIdentityKey setVisitorIdentityKey fun setVisitorIdentityKey(key: String): CoreSettingsBuilderSets the visitor identity key to monitor from the DataLayer. Changes to the value found at this key signify that the visitor has changed and will trigger visitor id switching.There is no default for this valueParameterskeythe key to monitor for changes in the DataLayer