JSFiddle - React, Tailwind, and code Playground

JavaScript

var jsonData =    [{"label":"Hass1(xxx_sem@hotmail.com)","value":"xxx_sem@hotmail.com"},{"label":"Hass(sxx_sem@hotmail.com)","value":"sxx_sem@hotmail.com"},{"label":"Sam(sx_sem@hotmail.com)","value":"sx_sem@hotmail.com"}];

function convert(data) {
    var obj = {};
    for (var i = 0; i<data.length; i++) {
        obj[data[i].label] = data[i].value;
    }
    return obj;
}

console.log(convert(jsonData));