server/auth: Add TokenSource call.

server/auth/cache_test.go

Index: server/auth/cache_test.go
diff --git a/server/auth/cache_test.go b/server/auth/cache_test.go
index ea2ee3a4e78b7d660c18dab70b55633c0e306b84..c46732ec9ec177f445caf76f9eabfd7b719c7259 100644
--- a/server/auth/cache_test.go
+++ b/server/auth/cache_test.go
@@ -19,6 +19,8 @@ import (
 )
 
 func TestTokenCache(t *testing.T) {
+	t.Parallel()
+
 	Convey("with mocked cache", t, func() {
 		cache := &mockedCache{}