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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def add_platform(name, platform_set, server_url):
    '''
    To add an ASAM platform using the specified ASAM platform set on the Novell
    Fan-Out Driver

    CLI Example:

    .. code-block:: bash

        salt-run asam.add_platform my-test-vm test-platform-set prov1.domain.com
    '''
    config = _get_asam_configuration(server_url)
    if not config:
        return False

    platforms = list_platforms(server_url)
    if name in platforms[server_url]:
        return {name: "Specified platform already exists on {0}".format(server_url)}

    platform_sets = list_platform_sets(server_url)
    if platform_set not in platform_sets[server_url]:
        return {name: "Specified platform set does not exist on {0}".format(server_url)}

    url = config['platform_edit_url']

    data = {
        'platformName': name,
        'platformSetName': platform_set,
        'manual': 'false',
        'previousURL': '/config/platformAdd.html',
        'postType': 'PlatformAdd',
        'Submit': 'Apply'
    }

    auth = (
        config['username'],
        config['password']
    )

    try:
        html_content = _make_post_request(url, data, auth, verify=False)
    except Exception as exc:
        err_msg = "Failed to add platform on {0}".format(server_url)
        log.error('%s:\n%s', err_msg, exc)
        return {name: err_msg}

    platforms = list_platforms(server_url)
    if name in platforms[server_url]:
        return {name: "Successfully added platform on {0}".format(server_url)}
    else:
        return {name: "Failed to add platform on {0}".format(server_url)}