code: public void setApiKeyInputStream(InputStream apiKeyInputStream) {
          this.clientBuilder.setApiKey(ApiKeys.builder().setInputStream(apiKeyInputStream).build());
      }
docs: Calls {@code clientBuilder.setApiKey(ApiKeys.builder().}{@link com.stormpath.sdk.api.ApiKeyBuilder#setInputStream(java.io.InputStream) setInputStream(apiKeyInputStream)}{@code .build())}.
  
  @param apiKeyInputStream the InputStream to use to construct a configuration Properties instance.
  @see ClientBuilder#setApiKey(com.stormpath.sdk.api.ApiKey)
  @see com.stormpath.sdk.api.ApiKeyBuilder#setInputStream(java.io.InputStream)
  @since 0.2