flask_oauthlib/provider/oauth2.py
def error_uri(self):
        """The error page URI.

        When something turns error, it will redirect to this error page.
        You can configure the error page URI with Flask config::

            OAUTH2_PROVIDER_ERROR_URI = '/error'

        You can also define the error page by a named endpoint::

            OAUTH2_PROVIDER_ERROR_ENDPOINT = 'oauth.error'
        """
        error_uri = self.app.config.get('OAUTH2_PROVIDER_ERROR_URI')
        if error_uri:
            return error_uri
        error_endpoint = self.app.config.get('OAUTH2_PROVIDER_ERROR_ENDPOINT')
        if error_endpoint:
            return url_for(error_endpoint)
        return '/oauth/errors'
def error_uri(self):
        """The error page URI.

        When something turns error, it will redirect to this error page.
        You can configure the error page URI with Flask config::

            OAUTH2_PROVIDER_ERROR_URI = '/error'

        You can also define the error page by a named endpoint::

            OAUTH2_PROVIDER_ERROR_ENDPOINT = 'oauth.error'
        """
        error_uri = self.app.config.get('OAUTH2_PROVIDER_ERROR_URI')
        if error_uri:
            return error_uri
        error_endpoint = self.app.config.get('OAUTH2_PROVIDER_ERROR_ENDPOINT')
        if error_endpoint:
            return url_for(error_endpoint)
        return '/oauth/errors'
The error page URI.

        When something turns error, it will redirect to this error page.
        You can configure the error page URI with Flask config::

            OAUTH2_PROVIDER_ERROR_URI = '/error'

        You can also define the error page by a named endpoint::

            OAUTH2_PROVIDER_ERROR_ENDPOINT = 'oauth.error'