我正在尝试创建一个REST API来注册新用户，我使用Django REST框架并使用AngularJS调用API：
当我使用POST方法调用API时，我得到了这个错误：
不允许的方法（POST）：/API/v1/accounts
下面是我的代码：

Server端

views.py

from rest_framework import permissions, viewsets, status, views
from django.contrib.auth import authenticate, login, logout
from authentication.serializers import AccountSerializer
from authentication.permissions import IsAccountOwner
from rest_framework.response import Response
from authentication.models import Account
import json

class AccountViewSet(viewsets.ModelViewSet):
    lookup_field = 'username'
    queryset = Account.objects.all()
    serializer_class = AccountSerializer

    def get_permissions(self):
        if self.request.method in permissions.SAFE_METHODS:
            return (permissions.AllowAny(),)

        if self.request.method == "POST":
            return (permissions.AllowAny(),)

        return (permissions.IsAuthenticated(), IsAccountOwner(),)

    def create(self, request):
        serializer = self.serializer_class(data=request.data)

        if serializer.is_valid():
            Account.objects.create_user(**serializer.validated_data)
            return Response(serializer.validated_data, status=status.HTTP_201_CREATED)

        return Response({
            'status': 'Bad Request',
            'message': 'Account could not be created with received data'
        }, status=status.HTTP_400_BAD_REQUEST)

serialisers.py

from django.contrib.auth import update_session_auth_hash
from rest_framework import serializers
from authentication.models import Account

class AccountSerializer(serializers.ModelSerializer):
    password = serializers.CharField(write_only=True, required=False)
    confirm_password = serializers.CharField(write_only=True, required=False)

    class Meta:
        model = Account
        fields = ('id', 'email', 'username', 'created_at', 'updated_at',
                  'first_name', 'last_name', 'tagline', 'password',
                  'confirm_password',)
        read_only_fields = ('created_at', 'updated_at',)

        def create(validated_data):
            return Account.objects.create(**validated_data)

        def update(self, instance, validated_data):
            instance.username = validated_data.get('username', instance.username)
            instance.tagline = validated_data.get('tagline', instance.tagline)

            instance.save()

            password = validated_data.get('password', None)
            confirm_password = validated_data.get('confirm_password', None)

            if password and confirm_password and password == confirm_password:
                instance.set_password(password)
                instance.save()

            update_session_auth_hash(self.context.get('request'), instance)

            return instance

permissions.py

from rest_framework import permissions

class IsAccountOwner(permissions.BasePermission):
    def has_object_permission(self, request, view, account):
        if request.user:
            return account == request.user
        return False

urls.py

from authentication.views import LoginView, LogoutView
from posts.views import AccountPostsViewSet, PostViewSet
from authentication.views import AccountViewSet
from rest_framework_nested import routers
from django.conf.urls import url, include
from django.contrib import admin
from CVC.views import IndexView

router = routers.SimpleRouter()
router.register(r'accounts', AccountViewSet)
router.register(r'posts', PostViewSet)
accounts_router = routers.NestedSimpleRouter(
    router, r'accounts', lookup='account'
)

accounts_router.register(r'posts', AccountPostsViewSet)
urlpatterns = [
    url(r'^api/v1/auth/login/$', LoginView.as_view(), name='login'),
    url(r'^api/v1/auth/logout/$', LogoutView.as_view(), name='logout'),
    url('^.*$', IndexView.as_view(), name='index'),
    url(r'^admin/', admin.site.urls),
    url(r'^api/v1/', include(router.urls)),
    url(r'^api/v1/', include(accounts_router.urls)),

对于客户端：
register.controller.js

(function () {
    'use strict';

    angular
        .module('thinkster.authentication.controllers')
        .controller('RegisterController', RegisterController);

    RegisterController.$inject = ['$location', '$scope', 'Authentication'];

    function RegisterController($location, $scope, Authentication) {
        var vm = this;
        activate();

        vm.register = register;
        function register() {
            Authentication.register(vm.email, vm.password, vm.username);
        }

        function activate() {
            if (Authentication.isAuthenticated()) {
                $location.url('/');
            }
        }
    }

})();

authentication.service.js

(function () {
    'use strict';

    angular
        .module('thinkster.authentication.services')
        .factory('Authentication', Authentication);

    Authentication.$inject = ['$cookies', '$http'];

    function Authentication($cookies, $http) {
        var Authentication = {
            getAuthenticatedAccount: getAuthenticatedAccount,
            setAuthenticatedAccount: setAuthenticatedAccount,
            isAuthenticated: isAuthenticated,
            login: login,
            logout: logout,
            register: register,
            unauthenticate: unauthenticate
        };

        return Authentication;

        function register(email, password, username) {
            return $http.post('/api/v1/accounts', {
                email: email,
                password: password,
                username: username
            }).then(registerSuccessFn, registerErrorFn);

            function registerSuccessFn(data, status, headers, config) {
                Authentication.login(email, password);
            }

            function registerErrorFn(data, status, headers, config) {
                console.error('Epic failure!');
            }
        }

        function login(email, password) {
            return $http.post('/api/v1/auth/login/', {
                email: email, password: password
            }).then(loginSuccessFn, loginErrorFn);

            function loginSuccessFn(data, status, headers, config) {
                Authentication.setAuthenticatedAccount(data.data);

                window.location = '/';
            }

            function loginErrorFn(data, status, headers, config) {
                console.error('Epic failure!');
            }
        }

        function logout() {
            return $http.post('/api/v1/auth/logout/')
                .then(logoutSuccessFn, logoutErrorFn);

            function logoutSuccessFn(data, status, headers, config) {
                Authentication.unauthenticate();

                window.location = '/';
            }

            function logoutErrorFn(data, status, headers, config) {
                console.error('Epic failure!');
            }
        }

        function getAuthenticatedAccount() {
            if (!$cookies.authenticatedAccount) {
                return;
            }

            return JSON.parse($cookies.authenticatedAccount);
        }

        function isAuthenticated() {
            return !!$cookies.authenticatedAccount;
        }

        function setAuthenticatedAccount(account) {
            $cookies.authenticatedAccount = JSON.stringify(account);
        }

        function unauthenticate() {
            delete $cookies.authenticatedAccount;
        }
    }
})();

我是Django和AnglarJS的新手，所以我不知道是哪个部分导致了这个问题？