axios firebase refresh token authorization header not override - firebase

Question

I'm trying to refresh token(firebase) in react native without success. It add the new token but in this way
Authorization Bearer old_token, Bearer new_token
Expected behaviour
Authorization Bearer new_token
Here is my code, we can see the instance, interceptor for append current token to all request and finally the interceptor for the refresh token. I don't know what I'm missing.
const customConfig: AxiosRequestConfig = {
baseURL: 'http://localhost:3000',
headers: {
'content-type': 'application/json',
},
responseType: 'json',
};
const instance: any = axios.create(
customConfig,
);
// interceptor to put token to all request
instance.interceptors.request.use(
async (config: any) => {
const token = await AsyncStorage.getItem('token');
if (token) {
config.headers.authorization = 'Bearer ' + token;
console.log("config.headers.authorization", config.headers.authorization)
}
return config;
},
(error: any) => {
Promise.reject(error);
},
);
// interceptor to handle refresh token
instance.interceptors.response.use((response: any) => {
return response;
},
function (error: any) {
console.log("error en axios", error)
const originalRequest = error.config;
if (!error.response) {
return Promise.reject('Network Error');
}
if ((error.response.status === 401) && !originalRequest._retry) {
originalRequest._retry = true;
return firebase.auth().currentUser?.getIdTokenResult(false).then((res) => {
AppStorage.setToken(res.token).then(() => { console.log('Token saved'); });
const addToken = 'Bearer ' + res.token;
instance.defaults.headers.common['Authorization'] = addToken;
originalRequest.headers['Authorization'] = addToken;
return axios(originalRequest);
});
}
return Promise.reject(error);
},
);