Fixes npm auth#3774

Merged

BYK merged 4 commits intoyarnpkg:masterfrom

arcanis:auth-fix

Jul 7, 2017

Commits on Jun 30, 2017

Fixes npm auth
Maël Nison
committed
Fixes yarn install with private packages
arcanis
committed

Commits on Jul 6, 2017

Fixes #3831
Maël Nison
committed
Uses constants
Maël Nison
committed