fix: put auth errors in good place

src/api/middlewares/errors.rs

@@ -0,0 +1,13 @@
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum AuthMiddlewareError {
+    #[error("invalid authorization format")]
+    InvalidAuthorizationFormat,
+
+    #[error("authentication required")]
+    AuthenticationRequired,
+
+    #[error("insufficient permissions")]
+    Forbidden,
+}