public with sharing class ApprovalController {
  // Get the list of scopes that pertain to the request
  // Some of the scopes may already be approved by the user
  @AuraEnabled
  public static Map<String, Object> init(String startURL){
    try {
      Map<String, String[]> scopes = new Map<String, String[]> ();
      // Get a hold of the AuthorizationContext
      cym.AuthorizationContext context = cym.AuthorizationContext.getContext(startURL);
      // List the scopes from the request
      scopes.put('requested', context.request.scope);
      // List the scopes which the user has already approved. 
      scopes.put('existing', context.consent.scopes);
      return new Map<String, Object> {
        'scopes' => scopes,
        'client' => JSON.deserializeUntyped(JSON.serialize(context.client))
      };
    } catch (Exception e) {
      throw new AuraHandledException(e.getMessage());
    }
  }
  // Method called to save the user consent
  @AuraEnabled
  public static void save(String startURL){
    try {
      cym.AuthorizationContext context = cym.AuthorizationContext.getContext(startURL);
      context.consent.add(context.request.scope);
    } catch (Exception e) {
      throw new AuraHandledException(e.getMessage());
    }
  }
}