一、错误位置

from django.urls import path

from users_app.views import RegisterView, LoginView, LogoutView

app_name = 'users'
urlpatterns = [
    path("register/", RegisterView.as_view, name="register"),
    path("login/", LoginView.as_view, name="login"),
    path("logout/", LogoutView.as_view, name="logout"),
]

三、解决办法

as_view作为一个方法后面需要＋()

    path("register/", RegisterView.as_view(), name="register"),
    path("login/", LoginView.as_view(), name="login"),
    path("logout/", LogoutView.as_view(), name="logout"),