How to use the ra-core.userLogin function in ra-core

      .catch(error => dispatch(userLogin({ error })));
  }

    ).then(result => dispatch(userLogin(result)));
  }

const login = (auth, dispatch, { redirectTo }) => dispatch(userLogin(auth, redirectTo));

.then(cognitoUser => {
        if (isNewPasswordRequired(cognitoUser)) {
          this.setState({
            cognitoUser,
            step: 'change_password',
          });
        } else {
          dispatch(userLogin(cognitoUser));
        }
      })
      .catch(error => dispatch(userLogin({ error })));