Why Data is null? React + Redux

Why Data is null? React + Redux. This is my first time using Redux.

This is my request. The request works well. Status is 200 and request return me data

const API_URL = "http://URL/";

class AuthService {
    static async onHandleSignIn(login: string, password: string) {
        await fetch(API_URL + 'api/Auth/signIn', {
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({
                'login': login,
                'password': password
            })
        }).then(response =>
            response.json().then(data => ({
                data: data,
                status: response.status
            })).then(res => {
                if (res.status === 200) {
                    localStorage.setItem('token', res.data.token);
                    return res.data
                }
            })
        )
    }
}

export default AuthService;

I try to get data in another method, they return undefined. The console shows that the data is undefined.

import AuthService from "../../../api/requests/authorization";

export const login = (username: string, password: string) => (dispatch: any) => {
    return AuthService.onHandleSignIn(username, password).then(
        (data) => {
            console.log(data) //data = undefined

            dispatch({
                type: "LOGIN_SUCCESS",
                payload: {user: data},
            });

            return Promise.resolve();
        },
        (error) => {
            dispatch({
                type: "LOGIN_FAIL",
            });

            console.log(error)

            return Promise.reject();
        }
    );
};

As I said, this is my first encounter with Redux. I will be glad for any help. TY)