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Could not clone ssh://git@git.sabre.com/tc/svt.git
java.lang.IllegalArgumentException: Username may not be null	at org.apache.commons.httpclient.UsernamePasswordCredentials.(UsernamePasswordCredentials.java:90)	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getURLWithCrendentials(CliGitAPIImpl.java:1376)	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getURLWithCrendentials(CliGitAPIImpl.java:1338)	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:52)	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:292)	at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:828)	at hudson.plugins.git.GitSCM.checkout(GitSCM.java:861)	at hudson.model.AbstractProject.checkout(AbstractProject.java:1411)	at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:652)	at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:88)	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:557)	at hudson.model.Run.execute(Run.java:1665)	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)	at hudson.model.ResourceController.execute(ResourceController.java:88)	at hudson.model.Executor.run(Executor.java:230)