code: public void setApiKeyProperties(Properties properties) {
          this.clientBuilder.setApiKey(ApiKeys.builder().setProperties(properties).build());
      }
docs: Calls {@code clientBuilder.setApiKey(ApiKeys.builder().}{@link com.stormpath.sdk.api.ApiKeyBuilder#setProperties(java.util.Properties) setProperties(properties)}{@code .build())}.
  
  @param properties the properties instance to use to load the API Key ID and Secret.
  @see ClientBuilder#setApiKey(com.stormpath.sdk.api.ApiKey)
  @see com.stormpath.sdk.api.ApiKeyBuilder#setProperties(java.util.Properties)
  @since 0.2