diff --git a/test/test.ts b/test/test.ts
index 632770f..98256b8 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -27,15 +27,19 @@ tap.test('should init the client', async () => {
 
 tap.test('should get accounts', async () => {
   const accounts = await testBunqAccount.getAccounts();
-  console.log(accounts[2].alias);
+  console.log(accounts);
 });
 
 tap.test('should get transactions', async () => {
   const accounts = await testBunqAccount.getAccounts();
   for (const account of accounts) {
     const transactions = await account.getTransactions();
-    // console.log(transactions);
+    console.log(transactions);
   }
 });
 
+tap.test('should stop the instance', async () => {
+  await testBunqAccount.stop();
+})
+
 tap.start();
diff --git a/ts/bunq.classes.account.ts b/ts/bunq.classes.account.ts
index 4050cae..a716b29 100644
--- a/ts/bunq.classes.account.ts
+++ b/ts/bunq.classes.account.ts
@@ -34,13 +34,22 @@ export class BunqAccount {
 
     // lets setup bunq client
     await plugins.smartfile.fs.ensureDir(paths.nogitDir);
-    await plugins.smartfile.fs.ensureFile(paths.bunqJsonFile, '{}');
-    const storageInstance = plugins.JSONFileStore(paths.bunqJsonFile);
-    this.bunqJSClient = new plugins.bunqCommunityClient.default(storageInstance);
+    await plugins.smartfile.fs.ensureFile(paths.bunqJsonProductionFile, '{}');
+    await plugins.smartfile.fs.ensureFile(paths.bunqJsonSandboxFile, '{}');
+    let apiKey: string;
+      
+    if (this.options.environment === 'SANDBOX') {
+      this.bunqJSClient = new plugins.bunqCommunityClient.default(plugins.JSONFileStore(paths.bunqJsonSandboxFile));
+      apiKey = await this.bunqJSClient.api.sandboxUser.post();
+      console.log(apiKey);
+    } else {
+      this.bunqJSClient = new plugins.bunqCommunityClient.default(plugins.JSONFileStore(paths.bunqJsonProductionFile));
+      apiKey = this.options.apiKey;
+    }
 
     // run the bunq application with our API key
     await this.bunqJSClient.run(
-      this.options.apiKey,
+      apiKey,
       this.permittedIps,
       this.options.environment,
       this.encryptionKey
@@ -79,4 +88,12 @@ export class BunqAccount {
     }
     return accountsArray;
   }
+
+  public async stop() {
+    if (this.bunqJSClient) {
+      this.bunqJSClient.setKeepAlive(false);
+      this.bunqJSClient.destroyApiSession();
+      this.bunqJSClient = null;
+    }
+  }
 }
diff --git a/ts/bunq.classes.monetaryaccount.ts b/ts/bunq.classes.monetaryaccount.ts
index 00f9c02..7c951c3 100644
--- a/ts/bunq.classes.monetaryaccount.ts
+++ b/ts/bunq.classes.monetaryaccount.ts
@@ -97,5 +97,6 @@ export class MonetaryAccount {
     for (const apiTransaction of apiTransactions) {
       transactionsArray.push(Transaction.fromApiObject(this, apiTransaction));
     }
+    return transactionsArray;
   }
 }
diff --git a/ts/bunq.paths.ts b/ts/bunq.paths.ts
index 95b3ab1..319c016 100644
--- a/ts/bunq.paths.ts
+++ b/ts/bunq.paths.ts
@@ -3,4 +3,5 @@ import * as plugins from './bunq.plugins';
 export const packageDir = plugins.path.join(__dirname, '../');
 export const nogitDir = plugins.path.join(packageDir, './.nogit/');
 
-export const bunqJsonFile = plugins.path.join(nogitDir, 'bunq.json');
\ No newline at end of file
+export const bunqJsonProductionFile = plugins.path.join(nogitDir, 'bunqproduction.json');
+export const bunqJsonSandboxFile = plugins.path.join(nogitDir, 'bunqsandbox.json');
\ No newline at end of file
diff --git a/ts/bunq.plugins.ts b/ts/bunq.plugins.ts
index 93e7266..44f53ff 100644
--- a/ts/bunq.plugins.ts
+++ b/ts/bunq.plugins.ts
@@ -17,7 +17,7 @@ export {
 };
 
 // third party
-import JSONFileStore from "@bunq-community/bunq-js-client/dist/Stores/JSONFileStore"; 
+import JSONFileStore from "@bunq-community/bunq-js-client/dist/Stores/JSONFileStore";
 import * as bunqCommunityClient from '@bunq-community/bunq-js-client';
 
 export { JSONFileStore, bunqCommunityClient };