I have been trying to get github authentication plugin working but keep getting following java dump...

java.io.FileNotFoundException: https://api.github.com/user at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:243) at com.squareup.okhttp.internal.huc.DelegatingHttpsURLConnection.getInputStream(DelegatingHttpsURLConnection.java:210) at com.squareup.okhttp.internal.huc.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:25) at org.kohsuke.github.Requester.parse(Requester.java:612) at org.kohsuke.github.Requester.parse(Requester.java:594) at org.kohsuke.github.Requester._to(Requester.java:272) Caused: org.kohsuke.github.GHFileNotFoundException: {"message":"Bad credentials","documentation_url":"https://developer.github.com/v3"} at org.kohsuke.github.Requester.handleApiError(Requester.java:686) at org.kohsuke.github.Requester._to(Requester.java:293) at org.kohsuke.github.Requester.to(Requester.java:234) at org.kohsuke.github.GitHub.getMyself(GitHub.java:384) at org.kohsuke.github.GitHub.<init>(GitHub.java:158) at org.kohsuke.github.GitHubBuilder.build(GitHubBuilder.java:207) at org.jenkinsci.plugins.GithubAuthenticationToken.getGitHub(GithubAuthenticationToken.java:211) at org.jenkinsci.plugins.GithubAuthenticationToken.<init>(GithubAuthenticationToken.java:126) at org.jenkinsci.plugins.GithubSecurityRealm$1.authenticate(GithubSecurityRealm.java:478) Caused: java.lang.RuntimeException at org.jenkinsci.plugins.GithubSecurityRealm$1.authenticate(GithubSecurityRealm.java:482) at jenkins.security.BasicHeaderRealPasswordAuthenticator.authenticate(BasicHeaderRealPasswordAuthenticator.java:56) at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:79) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87) at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249) at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87) at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90) at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:564) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124) at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128) at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199) at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

Here is what I'm doing.....

Within "Configure Global Security"
Select `Github Authentication Plugin`
GitHub Web URI: https://github.com
GitHub API URI: https://api.github.com
Client ID: xxxxx
Secret: xxxxx
OAuth Scope(s): write:org,user:email

Select `GitHub Committer Authorization Strategy`
Admin User Names: <list-of-user-id> 
Participant in Organization: veritone
Use GitHub repository permissions: checked
Grant READ permissions for /github-webhook: checked
Grant READ permissions for .*/cc.xml: checked

One way to see if from jenkins server itself I could make same github REST call is....
curl 'https://api.github.com/users/jpveritone?client_id=xxxxxxxx&client_secret=yyyyyyyy' .  and this works.

I am running jenkins version 2.89.2 with github-oauth plugin 0.28.1