Gmail API Java Quickstart Exception checkArgument(Preconditions.java:131)

[ptro46]

Summary

I follow this quickstart https://developers.google.com/gmail/api/quickstart/java
I create a project and enable the Gmail API
https://developers.google.com/workspace/guides/create-project
I create credentials
https://developers.google.com/workspace/guides/create-credentials
API Key, OAuth client ID, and a Service Account, I download the json file while I create the key in service Account, and I put this file as credentials.json in src/main/resources

Sample Name

Gmail Java Quickstart

Expected Behavior

no exception

Actual Behavior

$ gradle run

Task :run FAILED
Exception in thread "main" java.lang.IllegalArgumentException
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:131)
at com.google.api.client.util.Preconditions.checkArgument(Preconditions.java:35)
at com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets.getDetails(GoogleClientSecrets.java:80)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow$Builder.(GoogleAuthorizationCodeFlow.java:211)
at GmailQuickstart.getCredentials(GmailQuickstart.java:55)
at GmailQuickstart.main(GmailQuickstart.java:69)

Specifications

• Java version (java -version)
  $ java -version
  java version "18.0.1.1" 2022-04-22
  Java(TM) SE Runtime Environment (build 18.0.1.1+2-6)
  Java HotSpot(TM) 64-Bit Server VM (build 18.0.1.1+2-6, mixed mode, sharing)

• OS Mac

[ptro46]

well, I found the response, first i use the json build from ID clients OAuth 2.0 and not the json build from service Account, and then in ID clients OAuth 2.0 i add the URL in backend section : http://localhost:8888/Callback, and it's ok

[erikacamilleri]

I am experiencing this issue as well in a maven project. I am not quite understanding @ptro46 comment. However, it seems to be a configuration issue from the Google console rather than the code. Can instructions be clearer and more beginner friendly please?

[ptro46]

Hi @erikacamilleri in fact I was not using the correct json, when following their doc there are two different json generated and I was not using the correct one, taking the other it worked

[gianluca-valentini]

Hi @ptro46
can you explain the steps that you did to fix your issue?
I follow all the steps and create the json from service-account key. But I have the follow error

Exception in thread "main" java.lang.IllegalArgumentException
	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:121)
	at com.google.api.client.util.Preconditions.checkArgument(Preconditions.java:35)
	at com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets.getDetails(GoogleClientSecrets.java:80)
	at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow$Builder.<init>(GoogleAuthorizationCodeFlow.java:211)
	at tech.sharelock.google.drive.AdminSDKReportsQuickstart.getCredentials(AdminSDKReportsQuickstart.java:65)
	at tech.sharelock.google.drive.AdminSDKReportsQuickstart.main(AdminSDKReportsQuickstart.java:74)

it is the same stack trace

This is my configuration

The downloaded json is what i use as credential.json
Where am I doing wrong?