Not receving data from HTTP post request

Hello,

I am having a problem using the cordova plugin advanced HTTP.

So I’m trying to log to my local API with this code

const tab = {
    'pseudo' : this.pseudo,
    'mdp' : this.mdp
};

this.http.setDataSerializer('json');
this.http.setHeader('localhost:8080', 'Content-Type', 'application/json');

this.http.post('http://localhost:8080/api/utilisateur/login/', tab, {}).
   then(reponse => {
        console.log(reponse);
   })
   .catch(error => {
        console.log(error);
   });

and the console is displaying me a anwser with status 200 but with data empty but i’m supposed to receive the token.

Hope you guys can help me !
Thanks !