the following tables exist in the database:

CREATE TABLE users (
  user_id TEXT PRIMARY KEY,
  email TEXT UNIQUE NOT NULL,
  email_verified INTEGER NOT NULL
)

CREATE TABLE signin_keys (
  user_id TEXT PRIMARY KEY,
  key TEXT NOT NULL,
  expires INTEGER NOT NULL
)

CREATE TABLE sessions (
  session_id TEXT PRIMARY KEY
  user_id TEXT UNIQUE NOT NULL,
  expires INTEGER NOT NULL
)