Types used to store Kerberos credentials in a ccache
Load and save into a file: ```norun use kerberosccache::CCache; use std::fs;
let data = fs::read("./bob_tgt.ccache").expect("Unable to read file");
let ccache = CCache::parse(&data) .expect("Unable to parse file content") .1;
let data2 = ccache.build(); fs::write("./bobtgt2.ccache", data_2).expect("Unable to write file"); ```