serverless config credentials --provider provider --apihost apihost --auth auth--provideror-pThe provider (in this caseopenwhisk). Required.--apihostor-hTheopenwhisk_apihost. Required.--author-aTheopenwhisk_auth. Required.
config:credentials:config
serverless config credentials --provider openwhisk --apihost openwhisk.ng.bluemix.net --auth username:passwordCredentials are stored in ~/.wskprops, which you can edit directly if needed.