Use map of identity_provider to accommodate env var enumerations.

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/client/session/mod.rs

@@ -52,7 +52,7 @@ pub(crate) async fn get_login_types_route(
 	let identity_providers: Vec<_> = services
 		.config
 		.identity_provider
-		.iter()
+		.values()
 		.filter(|_| list_idps)
 		.cloned()
 		.map(|config| IdentityProvider {

src/api/client/session/sso.rs

@@ -90,9 +90,9 @@ pub(crate) async fn sso_login_route(
 	let default_idp_id = services
 		.config
 		.identity_provider
-		.iter()
+		.values()
 		.find(|idp| idp.default)
-		.or_else(|| services.config.identity_provider.iter().next())
+		.or_else(|| services.config.identity_provider.values().next())
 		.map(IdentityProvider::id)
 		.map(ToOwned::to_owned)
 		.unwrap_or_default();
@@ -419,7 +419,7 @@ pub(crate) async fn sso_callback_route(
 	let next_idp_url = services
 		.config
 		.identity_provider
-		.iter()
+		.values()
 		.filter(|idp| idp.default || services.config.single_sso)
 		.skip_while(|idp| idp.id() != idp_id)
 		.nth(1)