React Native fetch doesn't work in another fetch callback - react-native

Question

If I call my api function from POINT 1, fetch method inside the api method works well. When I comment it out and call the function at POINT 2 fetch method inside the addAccount() doesn't work. There is no exception, no rejection, no request on Reactotron, even I can't find request over Charles Proxy. What is the difference and what I have to know to figure it out?
I tried with RN 0.55.2 and 0.57.5
// Auth.js typical react native component
import * as api from '../actions/api';
class Auth extends Component {
// first triggered function
loginAccount(){
// api.addAccount(); // POINT 1 - this line works well if I uncomment
fetch('https://domain-a.com/login/',{
method: 'POST',
credentials: "same-origin",
headers: {
'accept-language': 'en-US;q=1',
'Content-type': 'application/x-www-form-urlencoded; charset=UTF-8',
},
body: encodeURIComponent(bodyParameters)
}).then((response) => {
console.log(response);
return response.json()
}).then(({ status, invalid_credentials }) => {
if(status == "ok"){
CookieManager.get('https://domain-a.com')
.then((cookies) => {
this.fetchAccountData(cookies);
})
})
}
fetchAccountData(cookies){
fetch('https://domain-a.com/'+cookies.user_id+'/info/',{
method: 'GET',
headers: {
'cookie': cookies
}
}).then((response) => {
return response.json();
})
.then(({ user, status }) => {
api.addAccount(); // POINT 2 - this line doesn't work
});
}
}
// api.js
// I repleaced fetch code with document example just to be clearify
export const addAccount = () => {
console.log("fetch begin"); // always works
fetch('https://facebook.github.io/react-native/movies.json')
.then((response) => response.json())
.then((responseJson) => {
console.log(responseJson); // won't works from point 2
})
.catch((error) =>{
console.error(error); // never runs
});
}

Answer 1

It looks like your first .then statement in the addAccount() function is missing a return statement. responseJson would be undefined without a proper a 'return response.json()' statement. Also adding brackets for better semantic formatting.
export const addAccount = () => {
console.log("fetch begin"); // always works
fetch('https://facebook.github.io/react-native/movies.json')
.then((response) => {
console.log(response); //test this response
return response.json();
})
.then((responseJson) => {
console.log(responseJson); // won't works from point 2
})
.catch((error) =>{
console.error(error); // never runs
});
}