function getSectorsList() {
  return API.getSectorsList()
    .then(function (value) {
      console.log(value.data)
    });
}
Return list of companies with their sector name
[{
      sector: "NIFTY IT ", //Sector name
      symbol: "TRIGYN", //company symbol
      PE: "0", // Symbol P/E value
      date: "08-Jun-2018 06:45:10", // last date
      sectorPE: "19.53" // Sectoral Index P/E value
    }],
@returns {array}