def get_oid_identity_url(self, provider_name: str) -> Optional[str]:
        """
        Returns the OIDC identity provider URL
        """
        for provider in self.openid_providers:
            if provider.get("name") == provider_name:
                return provider.get("url")

        Returns the OIDC identity provider URL
        
flask_appbuilder/security/manager.py