urlpatterns = [
     path('register/', views.RegisterView.as_view()), 
    # 註冊視圖, /user/register/
 ]    

class RegisterView(APIView):
    permission_classes = (AllowAny,)
    def post(self,request):
        """
        接收郵箱和密碼, 前端校驗兩遍一致性, 註冊成功後返回成功, 然後用戶自行登錄獲取token
        1. 隨機用戶名
        2. 生成用戶
        3. 設置用戶密碼
        4. 保存用戶
        :param request:
        :return:  {'code':0,'msg':'註冊成功'}
        """
        email=request.data.get('email')
        password=request.data.get('password')
        if all([email,password]):
            pass
        else:
            return Response({'code':9999,'msg':'參數不全'})
        rand_name=self.randomUsername()
        user=User(username=rand_name,email=email)
        user.set_password(password)
        user.save()
        return Response({'code':0,'msg':'註冊成功'})
    def randomUsername(self):
        d=datetime.datetime.now()
        base='SYL'
        time_str = '%04d%02d%02d%02d%02d' % (d.year, d.month, d.day, d.hour, d.minute)
        rand_num = str(random.randint(10000, 99999))
        return base + time_str + rand_num

# 自定義驗證後端 
AUTHENTICATION_BACKENDS = ['user.utils.EmailAuthBackend']

class EmailAuthBackend:
    def authenticate(self,request,username=None,password=None):
        try:
            user=User.objects.get(username=username)

        except Exception as e:
            user=None
        if not user:
            try:
                user=User.objects.get(email=username)
            except Exception as e:
                user=None
        if user and user.check_password(password):
            return user
        else:
            return None

    def get_user(self,user_id):
        try:
            return User.objects.get(pk=user_id)
        except User.DoesNotExist:
            return None

//192.168.56.100:8888/user/register/