How do I initialize new_user->friends so that I don't get a valgrind error 
int create_user(const char *name, User **user_ptr_add) {
        if (strlen(name) >= MAX_NAME){
                return 2;
        }
        User *next_node = *user_ptr_add;
        if (next_node == NULL) {
                *user_ptr_add = malloc(sizeof(User));
                strcpy((*user_ptr_add)->name, name);
                (*user_ptr_add)->profile_pic[0] = '\0';
                (*user_ptr_add)->next = NULL;
                return 0;
        } else {
                while (next_node->next != NULL) {
                        if (strcmp(next_node->name, name) == 0){
                                return 1;
                        }
                        next_node = next_node->next;
                }
                User *new_user = malloc(sizeof(User));
                strcpy(new_user->name, name);
                new_user->profile_pic[0] = '\0';
                new_user->next = NULL;
                next_node->next = new_user;
                return 0;
        }
}