demarches-normaliennes/app/services/france_connect_service.rb

class FranceConnectService
  def self.authorization_uri
    client = FranceConnectParticulierClient.new

    client.authorization_uri(
      scope: [:profile, :email],
      state: SecureRandom.hex(16),
      nonce: SecureRandom.hex(16))
  end

  def self.retrieve_user_informations_particulier(code)
    client = FranceConnectParticulierClient.new(code)

    access_token = client.access_token!(client_auth_method: :secret)

    user_info = access_token.userinfo!
    hash = Hashie::Mash.new(user_info.raw_attributes)

    hash.france_connect_particulier_id = hash.sub
    hash
  end
end