Login async

login-async.js

const logIn = (email, password) => async dispatch => {
  dispatch({ type: 'LOG_IN_REQUEST' });

  try {
    const user = api.authenticateUser(email, password);
    dispatch({ type: 'LOG_IN_SUCCESS', payload: user });
  catch (error) {
    dispatch({ type: 'LOG_IN_ERROR', payload: error });
  }
};