Create a KV namespace and wire it into config
kv
// what it does
Provisions a new KV namespace on your account. It prints the generated `id` along with a ready-to-paste `kv_namespaces` block — drop that into wrangler.jsonc so your Worker can reach the store via `env.SESSIONS`. This is always the first step before any key operations.
// shell
$ wrangler kv namespace create SESSIONS// gotcha
The argument is the binding title, not an id — creating the namespace does not wire it up. You must copy the printed `id` into your config yourself, and the binding name in code must match exactly.