USE mdb
ALTER TABLE usp_mailbox
  ADD client_id nvarchar(240),
      client_secret nvarchar(240),
      redirect_url nvarchar(240),
      auth_endpoint nvarchar(240),
      token_endpoint nvarchar(240),
      scope nvarchar(240),
      auth_provider int,
      refresh_token nvarchar(240),
      expires_in int;