Expose PAM module API

src/lib.rs

+#[macro_use] extern crate pamsm;
+
 mod config;
 mod pam;

src/pam.rs

@@ -34,7 +34,6 @@ use oauth2::basic::{
 };
 use oauth2::reqwest::http_client;
 
-extern crate pamsm;
 use pamsm::{PamServiceModule, Pam, PamFlag, PamError, PamLibExt};
 
 fn get_or_pam_error(config: &Config, key: &str) -> Result<String, PamError> {
@@ -104,3 +103,5 @@ impl PamServiceModule for PamOidc {
         return PamError::SERVICE_ERR;
     }
 }
+
+pam_module!(PamOidc);