const result = await backend.post<RequestBodyType, ResponseBodyType>(`register`, {
                email,
                username,
                password,
            });

interface AuthResponse {
    token: string;
    token_type: string;

    access_token: string;
    access_token_expires_at: string;

    refresh_token: string;
    refresh_token_expires_at: string;
}

interface TBody {
    grant_type: string
    refresh_token: string
}

const t = async (): Promise<void> => {

    const data = await axios.post<AuthResponse, AxiosResponse<AuthResponse, TBody>, TBody>("theurl", {
        grant_type: 'kjkjk',
        refresh_token: "dddf",
    }, {
        headers: {
            Authorization: "dfdfds",
            "Content-Type": "application/json",
        },
    })

    const resu: AuthResponse = data.data

}