React Native - get user i cant show in my app

I am doing a tutorial on react-native, I understand most of the concepts but not enough. I need to show the authenticated user, I am using react-native and laravel creates the api through the passport.

Routes Api in Laravel.

 Route::post('getUser', 'Api\AuthController@getUser');

Method in AuthController

public function getUser() {
 $userDetails = Auth::user();
 return response()->json(['success' => $userDetails], $this->successStatus);
 }

Page Profile in React-native

import React, { Component } from 'react';
import {
  StyleSheet,
  Text,
  View,
  TouchableOpacity
} from 'react-native';
import {connect} from 'react-redux';

import {salirUsuario} from '../actions/auth.actions';
import Loader from '../components/Loader';

class Profile extends Component<{}> {

  salirUsuario = () => {
    this.props.dispatch(salirUsuario());
  }

 render() {
    const {getUser: {userDetails}} = this.props;

        return(
            <View style={styles.container}>
                 <Text style={styles.textStyle}>This is a profile page for {userDetails ? userDetails.name : "Nada"}</Text>
           <TouchableOpacity style={styles.button} onPress={this.salirUsuario}>
             <Text style={styles.buttonText}>Logout</Text>
           </TouchableOpacity>
            </View>
            )
    }
}

mapStateToProps = state => ({
  getUser: state.userReducer.getUser
});

mapDispatchToProps = dispatch => ({
  dispatch
});

export default connect(mapStateToProps, mapDispatchToProps)(Profile);

And reducer user.reducer.js

import {combineReducers} from 'redux';

const getUser = (state = {}, action) => {
    switch (action.type) {

      case "GET_USER_LOADING":
          return {
            isLoading: true,
            isError: false,
            isSuccess: false,
            userDetails: null,
            errors: null
          }

      case "GET_USER_SUCCESS":
          return {
            isLoading: false,
            isError: false,
            isSuccess: true,
            userDetails: action.payload,
            errors: null
          }

      case "GET_USER_FAIL":
          return {
            isLoading: false,
            isError: true,
            isSuccess: false,
            userDetails: null,
            errors: action.payload
          }

      default:
        return state;
    }
}

export default combineReducers({
  getUser
});

I don't know if anyone can understand me, but I can't continue without solving it.

Thanks for everything....