var assert = require('assert')

var toNerfDart = require('./nerf-dart.js')

module.exports = clearCredentialsByURI

function clearCredentialsByURI (uri) {
  assert(uri && typeof uri === 'string', 'registry URL is required')

  var nerfed = toNerfDart(uri)

  this.del(nerfed + ':_authToken', 'user')
  this.del(nerfed + ':_password', 'user')
  this.del(nerfed + ':username', 'user')
  this.del(nerfed + ':email', 'user')
}