add oidc login
To be able to use envlt when working locally when no access to jwt token is available, add an oid authentication directly into envlt in the same way than vault client: vault login -method=oid role=...
To be able to use envlt when working locally when no access to jwt token is available, add an oid authentication directly into envlt in the same way than vault client: vault login -method=oid role=...