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Visit http://build-system-ops.prod.sagebase.org:8080/job/verify_oauth_client/ and login to Jenkins. You must be on the Sage VPN to access this server.
Click "Build with parameters".
Enter the client ID (in this case 100100) and click "Build".
When the build finishes successfully the client is verified.
Reply to the requester to notify them that their client is ready to be used.