JSFiddle - React, Tailwind, and code Playground

JavaScript

var dataItem=[{
  "Lucy":{
    "id": 456,
    "full_name": "GOOBER, ANGELA",
    "user_id": "2733245678",
    "stin": "2733212346"
  },
  "Myra":{
    "id": 123,
    "full_name": "BOB, STEVE",
    "user_id": "abc213",
    "stin": "9040923411"
  }
}]

for (var x in dataItem[0]) {
    if (dataItem[0].hasOwnProperty(x)) {
        console.log(x);
    }
}