Steps to reproduce:
1. Open Visual studio on 2 different VM's, not logged in on either
2. VM 1, login
3. VM 2, login
4. VM 1, create new local repository
5. VM 1, publish newly created repository (produces bad credentials error)
6. VM 1, publish a repository via manage connections -> github -> create (notice the dialog freezes)

Expected result: Each instance is treated individually without an issue to publishing and syncing.
Actual result: After signing in on a separate VM, bad credentials error message.

Extension.log

2016-05-03 12:38:57.0333|ERROR|thread:12|RepositoryPublishViewModel|Octokit.AuthorizationException: Bad credentials
   at Octokit.Connection.HandleErrors(IResponse response) in Y:\jenkins\workspace\GitHub for Visual Studio speakeasy jenkinskeep\submodules\octokit.net\Octokit\Http\Connection.cs:line 563
   at Octokit.Connection.<RunRequest>d__51.MoveNext() in Y:\jenkins\workspace\GitHub for Visual Studio speakeasy jenkinskeep\submodules\octokit.net\Octokit\Http\Connection.cs:line 545
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Octokit.Connection.<Run>d__50`1.MoveNext() in Y:\jenkins\workspace\GitHub for Visual Studio speakeasy jenkinskeep\submodules\octokit.net\Octokit\Http\Connection.cs:line 530
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Octokit.ApiConnection.<Post>d__17`1.MoveNext() in Y:\jenkins\workspace\GitHub for Visual Studio speakeasy jenkinskeep\submodules\octokit.net\Octokit\Http\ApiConnection.cs:line 0
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Octokit.RepositoriesClient.<Create>d__3.MoveNext() in Y:\jenkins\workspace\GitHub for Visual Studio speakeasy jenkinskeep\submodules\octokit.net\Octokit\Clients\RepositoriesClient.cs:line 90
{"message":"Bad credentials","documentation_url":"https://developer.github.com/v3"}
2016-05-03 12:39:11.7812|INFO|thread: 1|RepositoryHost|Logged off of host 'https://api.github.com/'
2016-05-03 12:39:11.7968|INFO|thread: 1|LoginCache|Erasing the git credential cache for host 'https://github.com/'