@Override
  public void register(String context) throws GeneralSecurityException {
    // no op
  }
Registers with KMS to create key for a unique pair of AccountId and ContainerId
@param accountId refers to the id of the {@link Account} to register
@param containerId refers to the id of the {@link Container} to register
ambry-router/src/main/java/com/github/ambry/router/SingleKeyManagementService.java