message: Look busy whilst requesting the email token
  We need to wait for it to finish before letting the user start
  completing the steps since if it fails, we can't complete the auth.
diff: @@ -97,7 +97,7 @@ export default React.createClass({
  sessionId: this.props.sessionId,
  clientSecret: this.props.clientSecret,
  emailSid: this.props.emailSid,
  - requestEmailToken: this.props.requestEmailToken,
  + requestEmailToken: this._requestEmailToken,
  });
  this._authLogic.attemptAuth().then((result) => {
  @@ -135,6 +135,19 @@ export default React.createClass({
  }
  },
  + _requestEmailToken: async function(...args) {
  + this.setState({
  + busy: true,
  + });
  + try {
  + return await this.props.requestEmailToken(...args);
  + } finally {
  + this.setState({
  + busy: false,
  + });
  + }
  + },
  +
  tryContinue: function() {
  if (this.refs.stageComponent && this.refs.stageComponent.tryContinue) {
  this.refs.stageComponent.tryContinue();
  