def METHOD_NAME(function_name: Optional[pulumi.Input[str]] = None,
                                      name: Optional[pulumi.Input[str]] = None,
                                      resource_group_name: Optional[pulumi.Input[str]] = None,
                                      opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[ListWebAppFunctionKeysResult]:
    """
    Get function keys for a function in a web site, or a deployment slot.
    :param str function_name: Function name.
    :param str name: Site name.
    :param str resource_group_name: Name of the resource group to which the resource belongs.
    """
    ...