does this check if user1 and user2 are in the list
else{ // more than one users in lst
            User *prev1 = head;
            User *curr1 = head->next;
            User *first_user;

            while (curr1->next != NULL){
                // check if user1 / user 2 is in the list
                if (strcmp(prev1->name, name1)==0){
                    if (prev1->friends[10] != NULL){
                        return 2;
                    }
                    first_user = prev1;
                }
                prev1 = curr1;
                curr1 = curr1->next;
            }
           