arangosh> db._create("users", { keyOptions: { allowUserKeys: false } });
[ArangoCollection 4177371067, "users" (type document, status loaded)]
arangosh> db.users.save({ name: "user 1" });
{
"_id" : "users/4177698747",
"_rev" : "4177698747",
"_key" : "4177698747"
}
arangosh> db.users.save({ name: "user 2", _key: "myuser" });
[ArangoError 1222: collection does not allow using user-defined keys]
arangosh> db.users.save({ name: "user 3" });
{
"_id" : "users/4178026427",
"_rev" : "4178026427",
"_key" : "4178026427"
}