The Weixin OAuth2 documentation:

Weixin supports two kinds of oauth2 authorization, one for open platform and one for media platform, AUTHORIZE_URL is the only difference between them, you can specify AUTHORIZE_URL in setting, If no AUTHORIZE_URL value is set will support open platform by default, which value is https://open.weixin.qq.com/connect/qrconnect.

You can optionally specify additional scope to use. If no SCOPE value is set, will use snsapi_login by default(for Open Platform Account, need registration). Other SCOPE options are: snsapi_base, snsapi_userinfo.

    'weixin': {
        'AUTHORIZE_URL': 'https://open.weixin.qq.com/connect/oauth2/authorize',  # for media platform
        'SCOPE': ['snsapi_base'],