userNameFetch.js

// <Route exact path="/staff/:staffId/:type" Component={StaffReference} />

// type == personal or work

// GET: /api/v1/get-refer/:staffId/:type

const { staffId, type } = req.params;
let findRef;
if (type === 'personal'){
  findRef = await PersonalReference.findOne({ where: { staffId }});
} else if (type === 'work') {
  findRef = await WorkReference.findOne({ where: { staffId }});
}

return res.json(findRef);

/*
* auto file response
*/