.. _05:

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lib.auth.__init__.get_user
==========================

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:func:`lib.auth.__init__.py:get_user`

The :func:`get_user` function first checks the ``request.environ`` environment dictionary to discover whether the ``_auth_user_environ_key`` (``AUTH_USER``) is bound. If it is, the bound value is returned. Otherwise, it checks the ``session`` to discover whether the _auth_user_session_key (``AUTH_USER_ID``) is bound and if so, returns that bound value.

If all else fails, ``None`` is returned, signifying that the check was not successful.

Either way, a value is returned to :func:`SignedIn` and then up the calling chain to the :func:`@authorize` decorator.