let socket;

Hooks.once("socketlib.ready", () => {
    socket = socketlib.registerModule("cass-a5e");
    // Register funcs
});

Hooks.once("init", () => {
    game.modules.get("cass-a5e").api = {};
    game.modules.get("cass-a5e").api.socket = null;
});

Hooks.once("ready", () => {
    if (game.user.isGM) {
        game.modules.get("cass-a5e").api.socket = socket;
    }
});