Hi @andy4
Sorry for taking some time to get back to you on this. 
We’ve updated the plugin and added a new Create express/standard/custom account action. Could you please upgrade your plugin to the latest version and give it a try? We will also update our documentation accordingly but here is an example in the meantime:
Please let us know if you need any clarification on this point or if you have more questions. 
Best regards,
Zeroqode Support Team