private ObjectMapper createObjectMapper() {
        final ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        return mapper;
    }
Refresh the user identity including any tokens associated with that user.

@param userIdentity
stroom-security/stroom-security-common-impl/src/main/java/stroom/security/common/impl/AbstractUserIdentityFactory.java