[BUG] npm login --auth-type=sso fail from 7.11.0 

`npm login --auth-type=sso` fail, because the params forceAuth is [{ token }](https://github.com/npm/cli/blob/a4e7f4e4b40d645fed97622a97c7fa72aa5da82b/lib/auth/sso.js#L20), but [_authToken](https://github.com/npm/npm-registry-fetch/blob/01081230444d142cc6bf37f702159f8ebcee5e64/auth.js#L55) is used in auth.js


https://github.com/npm/npm-registry-fetch/pull/50