F_A_8_Test_app/src/reducers/user/changeEmail.js

import * as actionTypes from './../../constants/user';
import initialState from './../initialState';

export default function changeEmailReducer(state = initialState.changeEmail, {  type, payload }) {
    switch (type) {
        case actionTypes.CHANGE_EMAIL_REQUEST: {
            return {
                ...state,
                isFetching: true,
                payload
            }
        }
        case actionTypes.CHANGE_EMAIL_REQUEST_SUCCESS: {
            const { user:{email} } = payload;
            console.log(email)

            return {
                ...state,
                isFetching: false,
                data:email
            }
        }
        case actionTypes.CHANGE_EMAIL_REQUEST_FAILURE: {
            const { error } = payload;

            return {
                ...state,
                isFetching: false,
                error
            }
        }
        default: {
            return state;
        }
    }
}