use_authorize setting should be retrieved from passed options

as well as from the request params. Setting use_authorize request param overrides the provided option from OmniAuth builder.
This conditional should be shortened to just

```ruby
options[:use_authorize] || request.params['use_authorize'] == 'true'
```

In the meantime, you can use the URL `/auth/twitter?use_authorize=true` to achieve the same result.