Creating Submenu in frontity.setting.js

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Hi all,
I’m VERY new to the whole Frontity space so sorry if my questions seems funny but
Is it possible to create a submenu in the frontity.setting.js page or do i have to follow some other method.
Below is my frontity.setting.js code

const settings = {
“name”: “frontity-project”,
“state”: {…},
“packages”: [
{
“name”: “jsnation-theme”,
“state”: {
“theme”: {
“menu”: [
[
“Home”,
“/”
],
[
“Members”,
“/members/”
],
[
“News”,
“/news/”
]

      ],
      "featured": {
        "showOnList": false,
        "showOnPost": false
      }
    }
  }
},
{
  "name": "@frontity/wp-source",
  "state": {
    "source": {..... }
  }
},
"@frontity/tiny-router",
"@frontity/html2react"

]
};

export default settings;

I want to create a sub menu in member, where i want to show member1,member2…

Thanks in advance