HRCenter/src/store/reducers/user/userReducer.js

import createReducer from '../../utils/createReducer';
import {
  SET_USER,
  SET_USER_ERROR,
} from '../../actions/user/userActionConstants';

const initialState = {
  id:"",
  firstName:"",
  lastName:"",
  username:"",
  token:"",
  refreshToken:""
};

export default createReducer(
  {
    [SET_USER]: setUser,
    [SET_USER_ERROR]: setUserError,
  },
  initialState,
);

function setUser(state, action) {
  return {
    id:action.payload.id,
    firstName:action.payload.firstName,
    lastName:action.payload.lastName,
    username:action.payload.username,
    token:action.payload.token,
    refreshToken:action.payload.refreshToken,
  };
}

function setUserError(state, action) {
  return {
    ...state,
    errorMessage: action.payload,
  };
}