Handling additional Scope Data

For newer Amazon APIs authenticated by Login with Amazon, such as Alexa, an additional scope_data parameter may be needed. This can be achieved by adding a few lines to the Strategy.js file to override the default behavior in passport-oauth2.

`OAuth2Strategy.prototype.authorizationParams = function(options){
if(options.authorizationParams){
return options.authorizationParams;
} else {
return {};
}
}`

Start in Strategy.js and read how the strategy currently delegates authorization parameters to passport-oauth2. Check the requested authorizationParams behavior against newer Amazon APIs that require additional scope_data. Done means the strategy can accept and pass the additional authorization parameters without changing existing behavior.

Written by the indexing model from the issue text.