How can I get the JWT token after authenticating? - reactjs

Question

I have a Rest spring-boot API that when a user authenticates the api returns the token jwt, I noticed in the browser that the token appears in the Response Header> Authentication and in the tests with the Postman it shows in the Body.
How can I get this token to store in the Local Storage browser by Reactjs?
My code that makes the requests looks like this:
import { ACCESS_TOKEN, API_BASE_URL } from '../constants';
export function request (options) {
const headers = {
'Content-Type': 'application/json',
}
if (localStorage.getItem(ACCESS_TOKEN)) {
headers.append('Authorzation', 'Bearer ' + localStorage.getItem(ACCESS_TOKEN))
}
return fetch(API_BASE_URL+options.url, {
method: options.method,
headers: headers,
body: options.body
})
.then(function(response){
// Falta pegar o token e gravar na local estorage
if (!response.ok) {
return Promise.reject(json);
}
return json;
});
};

Answer 1

// Save data to the current local store
localStorage.setItem("username", "John");
// Access some stored data
alert( "username = " + localStorage.getItem("username"));
The first argument of setitem is the key
My account got blocked by some down votes questions, the funny thing is I have to re-edit them, even though I already have the accepted answer.I do not understand what's the point to do this.I am so frustrated by this stackoverflow system.
Now, I basically can do nothing but keep editing my questions, and they have all been answered. This is ridiculous !!!