web/src/Web/wwwroot/app/accounts/views/accountsLoginTwoFactor.html

<p class="login-box-msg">Enter your two-step verification code.</p>
<form name="twoFactorForm" ng-submit="twoFactorForm.$valid && twoFactor(model)" api-form="twoFactorPromise">
    <div class="callout callout-danger validation-errors" ng-show="twoFactorForm.$errors">
        <h4>Errors have occured</h4>
        <ul>
            <li ng-repeat="e in twoFactorForm.$errors">{{e}}</li>
        </ul>
    </div>
    <div class="form-group has-feedback" show-errors>
        <label for="code" class="sr-only">Code</label>
        <input type="text" id="code" name="Code" class="form-control" placeholder="Verification code" ng-model="model.code"
               required api-field />
        <span class="fa fa-lock form-control-feedback"></span>
    </div>
    <div class="row">
        <div class="col-xs-offset-7 col-xs-5">
            <button type="submit" class="btn btn-primary btn-block btn-flat" ng-disabled="twoFactorForm.$loading">
                <i class="fa fa-refresh fa-spin loading-icon" ng-show="twoFactorForm.$loading"></i>Log In
            </button>
        </div>
    </div>
</form>