class Doorkeeper::OAuth::BaseRequest

def build_scopes
  if @original_scopes.present?
    OAuth::Scopes.from_string(@original_scopes)
  else
    client_scopes = @client&.scopes
    return default_scopes if client_scopes.blank?
    # Avoid using Scope#& for dynamic scopes
    client_scopes.allowed(default_scopes)
  end
end