When we use EC2 Plugin and specify AWS credentials to use to spin up instances, the plugin doesn't work when the AWS Credentials are rotated.

It works when we manually go to Manage Jenkins -> Configure System -> Click Save button.

```

WARNING: SlaveTemplate{ami='ami-067c8970c0b9a2d12', labels='wcs-build-agent-ec2'}. Exception during provisioning

com.amazonaws.services.ec2.model.AmazonEC2Exception: AWS was not able to validate the provided access credentials (Service: AmazonEC2; Status Code: 401; Error Code: AuthFailure; Request ID: a290fa76-f0fa-48ad-b9e8-2e2d41d5bb37)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1695)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1350)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1101)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:758)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:732)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:714)

at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:674)

at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:656)

at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:520)

at com.amazonaws.services.ec2.AmazonEC2Client.doInvoke(AmazonEC2Client.java:19296)

at com.amazonaws.services.ec2.AmazonEC2Client.invoke(AmazonEC2Client.java:19263)

at com.amazonaws.services.ec2.AmazonEC2Client.invoke(AmazonEC2Client.java:19252)

at com.amazonaws.services.ec2.AmazonEC2Client.executeDescribeInstances(AmazonEC2Client.java:9457)

at com.amazonaws.services.ec2.AmazonEC2Client.describeInstances(AmazonEC2Client.java:9429)

at com.amazonaws.services.ec2.AmazonEC2Client.describeInstances(AmazonEC2Client.java:9469)

at hudson.plugins.ec2.EC2Cloud.countCurrentEC2Slaves(EC2Cloud.java:383)

at hudson.plugins.ec2.EC2Cloud.getPossibleNewSlavesCount(EC2Cloud.java:541)

at hudson.plugins.ec2.EC2Cloud.getNewOrExistingAvailableSlave(EC2Cloud.java:559)

at hudson.plugins.ec2.EC2Cloud.provision(EC2Cloud.java:594)

at hudson.slaves.NodeProvisioner$StandardStrategyImpl.apply(NodeProvisioner.java:715)

at hudson.slaves.NodeProvisioner.update(NodeProvisioner.java:320)

at hudson.slaves.NodeProvisioner.access$000(NodeProvisioner.java:62)

at hudson.slaves.NodeProvisioner$NodeProvisionerInvoker.doRun(NodeProvisioner.java:809)

at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:72)

at jenkins.security.ImpersonatingScheduledExecutorService$1.run(ImpersonatingScheduledExecutorService.java:58)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)
```