CREATE TABLE IF NOT EXISTS users
(
    uuid         UUID PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
    phone_number VARCHAR(20)                                NOT NULL CHECK (phone_number ~ '^\+[0-9]{10,15}$'),
    created_at   TIMESTAMP        DEFAULT CURRENT_TIMESTAMP NOT NULL,
    verified     BOOLEAN          DEFAULT FALSE             NOT NULL,
    verified_at  TIMESTAMP                                  NULL

);