text: -- TODO: password categories
  
  CREATE TABLE passwords(
      password_id INTEGER PRIMARY KEY,
      service_name TEXT NOT NULL,
      service_url TEXT,
      account_name TEXT NOT NULL,
      password BLOB NOT NULL
  );
  
  CREATE TABLE salts(
      salt BLOB NOT NULL
  );
  
  CREATE TABLE fob_passwords(
      fob_password BLOB NOT NULL
  );
  