Airflow 2.0 Github Enterprise OAuth not working

[srthok]

I am not able to get github (GHE) based oauth..I was able to get it working in 1.10.x. This airflow is new 2.0 installation on another set of server. I believe I am making simple mistake in configuration. When I hit home page,It is redirecting me to login page as expected, and after succcessful login It is not redirecting back to home page. Instead I am being redirected to following page and getting 404.
https:///ghe-url/oauth/authiorize?response_type=code&client_id=4daf8925d11c79456432&redirect_uri=https%3A%2F%2F%2Foauth-authorized%2Fgithub&state=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJuZXh0IjpbImh0dHBzOi8vYWlyZmxvdy1wb2Muc2NpZW5jZS1hdC1zY2FsZS5pby9ob21lIl19.KuJipacU2DolDZ0YQAy_9yKsIwd4WP9FTDPEOt7OC_o
Here is how my webserver_config.py :

OAUTH_PROVIDERS = [{
'name':'github',
'token_key':'access_token',
'icon':'fa-github',
'remote_app': {
'api_base_url':'https://ghe-url/api/v3/users',
'request_token_params': {"scope": "user"},
'access_token_url':'https://ghe-url/login/oauth/access_token',
'authorize_url':'https://ghe-url/oauth/authiorize',
'request_token_url': None,
'client_id': 'xxxxxx',
'client_secret': 'xxxxx',
}
}]

There must be some config issue and I couldnt find any documentation..I greatly appreciate any inputs.