Use Getenv instead of LookupEnv
Use Getenv instead of LookupEnv

This prevents returning empty username if LOGNAME is set but empty and USER is set but not empty.
tallpauley/vault,hashicorp/vault,LolalyLuo/vault,mgk/vault,hartsock/vault,mgk/vault,hashicorp/vault,Banno/vault,rnaveiras/vault,wjam/vault,jmhardison/vault,hartsock/vault,mymercurialsky/vault,quixoten/vault,kingland/vault,mgk/vault,Caiyeon/vault,Aloomaio/vault,naunga/vault,rnaveiras/vault,MonsantoCo/vault,jmhardison/vault,joelthompson/vault,kingland/vault,Aloomaio/vault,rnaveiras/vault,deverton/hashicorp-vault,chrishoffman/vault,quixoten/vault,MonsantoCo/vault,rnaveiras/vault,naunga/vault,kingland/vault,michaelansel/vault,deverton/hashicorp-vault,joelthompson/vault,Banno/vault,lemondrank/vault,Caiyeon/vault,hartsock/vault,hashicorp/vault,ryon/vault,rnaveiras/vault,Aloomaio/vault,kingland/vault,joelthompson/vault,quixoten/vault,chrishoffman/vault,ryon/vault,lemondrank/vault,jmhardison/vault,michaelansel/vault,hashicorp/vault,mymercurialsky/vault,lirao/vault,jam-pot/vault,jmhardison/vault,LolalyLuo/vault,hartsock/vault,hashicorp/vault,jmhardison/vault,wjam/vault,quixoten/vault,hartsock/vault,tallpauley/vault,mgk/vault,Aloomaio/vault,hashicorp/vault,lirao/vault,kingland/vault,joelthompson/vault,jam-pot/vault