printf("Starting open_plugin_open_v1........n");
struct plugin_context *context;
context = (struct plugin_context *) calloc(1, sizeof(struct plugin_context));

/*
 * Set the username/password we will require.
 */
context->user_name = "s***";
context->pass_word = "r***";


/*
 * We are only interested in intercepting the
 * --auth-user-pass-verify callback.
 */
*type_mask = OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY);

printf("Ending open_plugin_open_v1");

return (openvpn_plugin_handle_t) context;

/* get username/password from envp string array */
const char *username = get_env("Username", envp);
const char *password = get_env("Password", envp);
if(username && password){
    return OPENVPN_PLUGIN_FUNC_ERROR;
}
/* check entered username/password against what we require */
if (!strcmp(username, context->user_name) && !strcmp(password, context->pass_word))
{
    return OPENVPN_PLUGIN_FUNC_SUCCESS;
}
else
{
    return OPENVPN_PLUGIN_FUNC_ERROR;
}