const npmFetch = require('npm-registry-fetch') module.exports = async (npm, opts) => { const { registry } = opts // First, check if we have a user/pass-based auth const creds = npm.config.getCredentialsByURI(registry) if (creds.username) { return creds.username } // No username, but we have other credentials; fetch the username from registry if (creds.token || creds.certfile && creds.keyfile) { const registryData = await npmFetch.json('/-/whoami', { ...opts }) return registryData.username } // At this point, even if they have a credentials object, it doesn't have a // valid token. throw Object.assign( new Error('This command requires you to be logged in.'), { code: 'ENEEDAUTH' } ) }