1. Go to Clients > Users and click Add User (top right).
2. Fill in First Name, Last Name and Email (required) — Phone, Birth Date and a Password are optional; if you leave the password blank one is treated as auto-generated.
3. Pick a Kitchen Location from the dropdown (only meaningful if you operate more than one).
4. Set any toggles/roles you need, then click Save.

On save, a user created this way (as opposed to one who signs up on the website) is auto-marked as validated (email confirmed), since an admin created it directly.