Add authentication from upstream providers (#107)

Let BasicOIDC delegate authentication to upstream providers (Google, GitHub, GitLab, Keycloak...)

Reviewed-on: #107

src/controllers/two_factors_controller.rs

@@ -17,14 +17,14 @@ use crate::data::webauthn_manager::WebAuthManagerReq;
 #[derive(Template)]
 #[template(path = "settings/two_factors_page.html")]
 struct TwoFactorsPage<'a> {
-    _p: BaseSettingsPage,
+    _p: BaseSettingsPage<'a>,
     user: &'a User,
 }
 
 #[derive(Template)]
 #[template(path = "settings/add_2fa_totp_page.html")]
-struct AddTotpPage {
-    _p: BaseSettingsPage,
+struct AddTotpPage<'a> {
+    _p: BaseSettingsPage<'a>,
     qr_code: String,
     account_name: String,
     secret_key: String,
@@ -33,8 +33,8 @@ struct AddTotpPage {
 
 #[derive(Template)]
 #[template(path = "settings/add_webauthn_page.html")]
-struct AddWebauhtnPage {
-    _p: BaseSettingsPage,
+struct AddWebauhtnPage<'a> {
+    _p: BaseSettingsPage<'a>,
     opaque_state: String,
     challenge_json: String,
     max_name_len: usize,