List-Mode: Retrieve and display data then exit.

def list_only():
    """List-Mode: Retrieve and display data then exit."""
    (cred, providers) = config_read()
    conn_objs = cld.get_conns(cred, providers)
    nodes = cld.get_data(conn_objs, providers)
    node_dict = make_node_dict(nodes, "name")
    table.indx_table(node_dict)