clean up & pass along errors from ZeroIDC::new() method

zeroidc/src/error.rs

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c)2022 ZeroTier, Inc.
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file in the project's root directory.
+ *
+ * Change Date: 2025-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2.0 of the Apache License.
+ */
+
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum ZeroIDCError
+{
+    #[error(transparent)]
+    DiscoveryError(#[from] openidconnect::DiscoveryError<openidconnect::reqwest::Error<reqwest::Error>>),
+
+    #[error(transparent)]
+    ParseError(#[from] url::ParseError),
+}