ezidam: added openid configration, well known route

crates/openid/src/error.rs

@@ -0,0 +1,11 @@
+// error
+#[derive(thiserror::Error)]
+// the rest
+#[derive(Debug)]
+pub enum Error {
+    #[error("Failed to parse an URL: `{0}`")]
+    UrlParse(#[from] url::ParseError),
+
+    #[error("Failed to serialize to JSON: `{0}`")]
+    JsonSerialization(#[from] serde_json::Error),
+}