class_docstr: Flask-AppBuilder auth manager.
  
  This auth manager is responsible for providing a backward compatible user management experience to users.
docstr: Return the login page url.
docstr_tok: ["Return","the","login","page","url","."]
code: def get_url_login(self, **kwargs) -> str:
      """Return the login page url."""
      if not self.security_manager.auth_view:
          raise AirflowException(
              "`auth_view` not defined in the security manager."
          )
      if "next_url" in kwargs and kwargs["next_url"]:
          return url_for(
              f"{self.security_manager.auth_view.endpoint}.login",
              next=kwargs["next_url"],
          )
      else:
          return url_for(
              f"{self.security_manager.auth_view.endpoint}.login"
          )
  
imports: from __future__ import annotations
  import argparse
  from functools import cached_property
  from pathlib import Path
  from typing import TYPE_CHECKING, Container
  from connexion import FlaskApi
  from flask import Blueprint, url_for
  from sqlalchemy import select
  from sqlalchemy.orm import Session, joinedload
  from airflow.auth.managers.base_auth_manager import BaseAuthManager, ResourceMethod
  from airflow.auth.managers.models.resource_details import AccessView, ConfigurationDetails, ConnectionDetails, DagAccessEntity, DagDetails, DatasetDetails, PoolDetails, VariableDetails
  from airflow.auth.managers.utils.fab import get_fab_action_from_method_map, get_method_from_fab_action_map
  from airflow.cli.cli_config import DefaultHelpParser, GroupCommand
  from airflow.configuration import conf
  from airflow.exceptions import AirflowException
  from airflow.models import DagModel
  from airflow.providers.fab.auth_manager.cli_commands.definition import ROLES_COMMANDS, SYNC_PERM_COMMAND, USERS_COMMANDS
  from airflow.providers.fab.auth_manager.models import Permission, Role, User
  from airflow.security import permissions
  from airflow.security.permissions import ACTION_CAN_ACCESS_MENU, ACTION_CAN_READ, RESOURCE_AUDIT_LOG, RESOURCE_CLUSTER_ACTIVITY, RESOURCE_CONFIG, RESOURCE_CONNECTION, RESOURCE_DAG, RESOURCE_DAG_CODE, RESOURCE_DAG_DEPENDENCIES, RESOURCE_DAG_PREFIX, RESOURCE_DAG_RUN, RESOURCE_DAG_WARNING, RESOURCE_DATASET, RESOURCE_DOCS, RESOURCE_IMPORT_ERROR, RESOURCE_JOB, RESOURCE_PLUGIN, RESOURCE_POOL, RESOURCE_PROVIDER, RESOURCE_SLA_MISS, RESOURCE_TASK_INSTANCE, RESOURCE_TASK_LOG, RESOURCE_TASK_RESCHEDULE, RESOURCE_TRIGGER, RESOURCE_VARIABLE, RESOURCE_WEBSITE, RESOURCE_XCOM
  from airflow.utils.session import NEW_SESSION, provide_session
  from airflow.utils.yaml import safe_load
  from airflow.www.extensions.init_views import _CustomErrorRequestBodyValidator, _LazyResolver
label_desc: Use image node_id 17 for calling the FabAuthManager obj's underlying member method code with example usage: obj.get_url_login() and returns: url_for, url_for