int make_post(const User *author, User *target, char *contents) {
    if (author == NULL || target == NULL){
        return 2;
    }

    if (friends_check(author, target) != 0){
        return 1;
    }

    Post* new_post = malloc(sizeof(Post));
    strcpy(new_post->author, author->name);
    strcpy(new_post->contents, contents);
    time_t *now = malloc(sizeof(time_t));
    *now = time(NULL);
    new_post->date = now;
    new_post->next = target->first_post;
    target->first_post = new_post;
    return 0;
}
post