id: added id create for handling ID needs

crates/id/src/lib.rs

@@ -0,0 +1,12 @@
+mod user;
+
+// error
+#[derive(thiserror::Error)]
+// the rest
+#[derive(Debug)]
+pub enum Error {
+    #[error("Invalid {0} ID")]
+    Invalid(&'static str),
+}
+
+pub use user::UserID;