refreshToken fails with unhandled exception: bad state: The 'handler' has already been called

[DigitalSeneca]

Where:

mosquito-alert-dart-sdk/lib/src/auth/jwt_auth.dart

Lines 43 to 79 in 6e75afc

	@override
	void onError(DioException err, ErrorInterceptorHandler handler) async {
	// Check if the error is due to an expired token (401)
	if (err.response?.statusCode != 401) {
	super.onError(err, handler);
	}
	try {
	// Try to refresh the token
	final Response<TokenRefresh> tokenRefreshResponse =
	await _authApi.refreshToken(
	tokenRefreshRequest: TokenRefreshRequest(
	(builder) => builder..refresh = this.refreshToken));
	final String? newToken = tokenRefreshResponse.data?.access;
	if (newToken != null) {
	this.accessToken = newToken;
	// Trigger the callback if it's provided
	if (onTokenUpdateCallback != null) {
	onTokenUpdateCallback!(newToken);
	}
	}
	} catch (_) {
	handler.reject(RevokedTokenException(requestOptions: err.requestOptions));
	return;
	}
	try {
	// Retry request
	err.requestOptions.headers.addAll(await _buildHeaders());
	handler.resolve(await _dio.fetch(err.requestOptions));
	} catch (_) {
	super.onError(err, handler);
	return;
	}
	}

What:

E/flutter (13937): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: Bad state: The `handler` has already been called, make sure each handler gets called only once.
E/flutter (13937): #0      _BaseHandler._throwIfCompleted (package:dio/src/interceptor.dart:34:7)
E/flutter (13937): #1      ErrorInterceptorHandler.reject (package:dio/src/interceptor.dart:182:5)
E/flutter (13937): #2      JwtAuthInterceptor.onError (package:mosquito_alert/src/auth/jwt_auth.dart:78:22)
E/flutter (13937): <asynchronous suspension>

Potential solution / thoughts:

handler can only be called once so calling handler.reject and then retrying request will cause calling the handler twice
Maybe we need to return early instead of calling handler.reject