git-cl: fix auth error message computation
git-cl: fix auth error message computation

Bug:
Change-Id: Ic57563b131ff7e50985748eeb3d55e4b69b8db87
Reviewed-on: https://chromium-review.googlesource.com/562279
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools