Custom Workflow Action - file fieldType not working

How to use file fieldType in custom workflow action?
I’ve tested but it’s just showing nothing.

 {
 "typeDefinition": {
 "name": "fileInput",
 "type": "string",
 "fieldType": "file"
 },
 "supportedValueTypes": [
 "STATIC_VALUE"
 ],
 "isRequired": false
 },

@nickiearchua - is it possible to give any more details of what you are trying to achieve here with your custom code action? File type properties are defined in a specific way in the object schema that references external data options (basically a file selector I believe).

Steve

I tried adding optionsUrl to fetch external source but it’s saying it’s not supported.
I thought this field will let me select files from the HubSpot Files.