处理您的索引URL并呈现您的index.html模板的视图必须具有登录表单，因为您必须将其设置为FormView后代，并将类属性设置为LoginForm（allauth的登录表单）。否则，您无法将{{form.as_p}}呈现到模板中（因为您的上下文中没有表单）。

The view that handles your 'index' url and renders your index.html template has to have a login form, for that you have to make it a FormView descendant, and set the class attribute to LoginForm (allauth's login form). Otherwise, you can't render {{form.as_p}} to the template (because there is no form in your context).