-- Drop old table
DROP TABLE IF EXISTS users CASCADE;

-- Create simplified users table
CREATE TABLE users (
    id SERIAL PRIMARY KEY,
    bank_user_id VARCHAR(50) UNIQUE NOT NULL,  -- e.g., "team275-6"
    password_hash TEXT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_users_bank_user_id ON users(bank_user_id);