fix bugs when Creates a new token

[darkterrorooo]

Description

[] It needs and includes Unit Tests

Changes in Client or Server public APIs

[] It includes documentation for these changes in /doc.

[darkterrorooo]

I found this bugs when doing stress testing . this bug may cause nuve to return respone twice and crash when create token.

[jcague]

@darkterrorooo this fix looks promising! It seems like lint is complaining though, could you fix those minor issues please?