[BUG]: authverifier for keycloak not implemented

[Eliesmbr]

Description of the bug

I am trying to connect my Keep instance to my external Keycloak as an authentication method using the Helm chart and am getting the following error in the backend:

Traceback (most recent call last):
  File "/venv/lib/python3.13/site-packages/gunicorn/app/base.py", line 110, in get_config_from_filename
    spec.loader.exec_module(mod)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/venv/lib/python3.13/site-packages/keep/api/config.py", line 8, in <module>
    from keep.api.api import AUTH_TYPE
  File "/venv/lib/python3.13/site-packages/keep/api/api.py", line 33, in <module>
    from keep.api.routes import (
    ...<24 lines>...
    )
  File "/venv/lib/python3.13/site-packages/keep/api/routes/actions.py", line 19, in <module>
    IdentityManagerFactory.get_auth_verifier(["read:actions"])
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/venv/lib/python3.13/site-packages/keep/identitymanager/identitymanagerfactory.py", line 82, in get_auth_verifier
    return IdentityManagerFactory._load_manager(auth_type, "authverifier", scopes)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/venv/lib/python3.13/site-packages/keep/identitymanager/identitymanagerfactory.py", line 120, in _load_manager
    raise NotImplementedError(
        f"{manager_class} for {manager_type} not implemented"
    )
NotImplementedError: authverifier for keycloak not implemented

Steps To Reproduce

1. Configure env varbiable AUTH_TYPE="KEYCLOAK"
2. Restart backend deployment
3. Getting the above mentioned stacktrace

Additional Information

No response