withCredentials([file(credentialsId: 'jenkins-test-project', variable: 'GOOGLE_APPLICATION_CREDENTIALS')])

Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to terratest-ss060
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1800)
		at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
		at hudson.remoting.Channel.call(Channel.java:1001)
		at hudson.FilePath.act(FilePath.java:1158)
		at hudson.FilePath.act(FilePath.java:1147)
		at hudson.FilePath.write(FilePath.java:2311)
		at hudson.FilePath.copyFrom(FilePath.java:1072)
		at org.jenkinsci.plugins.credentialsbinding.impl.FileBinding.write(FileBinding.java:54)
		at org.jenkinsci.plugins.credentialsbinding.impl.FileBinding.write(FileBinding.java:42)
		at org.jenkinsci.plugins.credentialsbinding.impl.AbstractOnDiskBinding.bindSingle(AbstractOnDiskBinding.java:39)
		at org.jenkinsci.plugins.credentialsbinding.Binding.bind(Binding.java:150)
		at org.jenkinsci.plugins.credentialsbinding.impl.BindingStep$Execution2.doStart(BindingStep.java:135)
		at org.jenkinsci.plugins.workflow.steps.GeneralNonBlockingStepExecution.lambda$run$0(GeneralNonBlockingStepExecution.java:77)
		at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
		at java.util.concurrent.FutureTask.run(FutureTask.java:266)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.nio.file.FileSystemException: /home/jenkins/agent/workspace/terratest/terratest-service-account@tmp/secretFiles/b966c0d5-011a-4121-bfa7-38ca17a568e9: Is a directory
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:91)
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
	at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214)
	at java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:434)
	at java.nio.file.Files.newOutputStream(Files.java:216)
	at hudson.FilePath$WritePipe.invoke(FilePath.java:2319)
	at hudson.FilePath$WritePipe.invoke(FilePath.java:2313)
	at hudson.FilePath$FileCallableWrapper.call(FilePath.java:3314)
	at hudson.remoting.UserRequest.perform(UserRequest.java:211)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:376)
	at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at hudson.remoting.Engine$1.lambda$newThread$0(Engine.java:119)
	at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE