Access keys
-----------
Create a Planviewer API access key, and for all server-side requests provide the
user and password as HTTP basic auth parameters. These credentials identify
the application for which these requests are made.

.. http:any:: https://www.planviewer.nl/maps_api/v2/server
.. http:any:: https://www.planviewer.nl/product_api/v1

    :reqheader Authorization:
          Base64 user and password separated with ':' as per HTTP standard.

    **Example request:**

    Given API acces key ``47e7df66f957`` and secret ``cynaivrjre``:

    .. sourcecode:: http

        POST /maps_api/v2/server/viewers
        Host: planviewer.nl
        Accept: application/json
        Authorization: Basic NDdlN2RmNjZmOTU3OmN5bmFpdnJqcmU=

    Or using curl:

    .. sourcecode:: shell

        $ curl https://planviewer.nl/maps_api/v1/server/map -u 47e7df66f957:cynaivrjre

    **Example response**:

    .. sourcecode:: json

        {
            "error": {
                "code": 401,
                "message": "Unauthorized"
            }
        }