code: public void serviceName_registry_credentials_credentialsId_DELETE(String serviceName, String credentialsId) throws IOException {
  		String qPath = "/caas/containers/{serviceName}/registry/credentials/{credentialsId}";
  		StringBuilder sb = path(qPath, serviceName, credentialsId);
  		exec(qPath, "DELETE", sb.toString(), null);
  	}
docs: Delete the registry credentials.
  
  REST: DELETE /caas/containers/{serviceName}/registry/credentials/{credentialsId}
  @param credentialsId [required] credentials id
  @param serviceName [required] service name
  
  API beta