Add methods for requiring more specific levels of teamleader auth

+ Add AuthError

src/Middleware/error/AuthError.ts

@@ -0,0 +1,13 @@
+import ForwardableError from "./ForwardableError";
+
+export default class AuthError extends ForwardableError {
+  protected __oid = "AUTH_ERROR";
+
+  constructor(message?: string) {
+    super(403, message ?? "The request did not provide sufficient authentication");
+  }
+
+  static isAuthError(err: any): err is AuthError {
+    return err.__oid === "AUTH_ERROR";
+  }
+}