Регистрация
         'form-signup']) ?>
        = $form->field($model,'username', [
            'options' => ['class' => 'form-group has-feedback'],
            'inputTemplate' => '{input}
',
            'template' => '{beginWrapper}{input}{error}{endWrapper}',
            'wrapperOptions' => ['class' => 'input-group mb-3']
        ])
            ->label(false)
            ->textInput(['placeholder' => $model->getAttributeLabel('username')]) ?>
        = $form->field($model,'email', [
            'options' => ['class' => 'form-group has-feedback'],
            'inputTemplate' => '{input}
',
            'template' => '{beginWrapper}{input}{error}{endWrapper}',
            'wrapperOptions' => ['class' => 'input-group mb-3']
        ])
            ->label(false)
            ->textInput(['placeholder' => $model->getAttributeLabel('email')]) ?>
        = $form->field($model, 'password', [
            'options' => ['class' => 'form-group has-feedback'],
            'inputTemplate' => '{input}
',
            'template' => '{beginWrapper}{input}{error}{endWrapper}',
            'wrapperOptions' => ['class' => 'input-group mb-3']
        ])
            ->label(false)
            ->passwordInput(['placeholder' => $model->getAttributeLabel('password')]) ?>
        
            
                = Html::submitButton('Регистрация', ['class' => 'btn btn-primary btn-block']) ?>