Strapi + React Native || login

General
1

Hi! I have a problem, I am trying to login from my React-Native App (running on my phone) and I always get error 400. I already built this app in Next.js and I know my strapi it’s fine, but something with my React-Native code doesn’t work.

I have something like:

// front-end
_signIn = () => {
    const {identifier, password} = this.state;
    const user = {identifier: identifier, password: password};
    signIn(user).then(res => {
      console.log(res);
    });
  };
// action
export const signIn = user => {
  return new Promise(resolve => {
    return axios(calls.signIn(user))
      .then(res => {
        resolve(res);
      })
      .catch(err => console.log(err));
  });
};
// calls
signIn: user => ({
    url: `${API_URL}/auth/local`,
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Accept: 'application/json',
    },
    body: user,
  }),

I really need help to understand why the heck it’s not working, I replaced the APP_URL with http://‘my-ip’:1337