support add authenticate method from class_views

[miss85246]

Support add authenticate method from class_views.

The current situation is when we Initialize, we must give the authenticate argument, or else raise AuthenticateNotImplemented Error：

sanic_jwt.exceptions.AuthenticateNotImplemented: Sanic JWT initialized without providing an authenticate method.

Sometimes, to maintain the consistency of the entrance， we will define all endpoints in one file, and export a class_views tuple. all of the endpoints will in class_views tuple, include authenticate method. for example:

# define all endpoints in authentication_view.py

from sanic_ext import validate
from sanic_jwt import BaseEndpoint

from schema.schemaUser import UserLogin, UserRegister
from services.serviceAuthorization import ServiceAuthorization
from utils import json_response


class AuthenticateEndpoint(BaseEndpoint):

    @validate(json=UserLogin)
    async def post(self, request, body: UserLogin, *args, **kwargs):
        pass


class RegisterEndpoint(BaseEndpoint):

    @validate(json=UserRegister)
    async def post(self, request, *args, **kwargs):
        pass

sanic_jwt_views = (
    ('/auth/register', RegisterEndpoint),
    ('/auth/login', AuthenticateEndpoint),
)

now we must initialize it in app.py like this:

# app.py

import ...

sanic_jwt_views = (
    ('/auth/register', RegisterEndpoint),
)

app = Sanic("my_jwt_server", config=config)
Initialize(server, class_views=authorization_views, authenticate=AuthenticateEndpoint.post, **config.jwt)

or else it will raise RouteExists Exception.

sanic_jwt_views = (
    ('/auth/register', RegisterEndpoint),
    ('/auth/login', AuthenticateEndpoint),
)

app = Sanic("my_jwt_server", config=config)
Initialize(server, class_views=authorization_views, authenticate=None, **config.jwt)

sanic_routing.exceptions.RouteExists: Route already registered: auth/auth/login [OPTIONS,POST]

I saw the class Initialize, in __add_endpoints function, we didn't do duplicate detection, and it will lead to RouteExists Error.

perhaps we need do duplicate detection in __add_endpoints function or __add_class_views function, and let authenticate to be a not require argument. to make our code more elegant and clean.