post '/login' do
      email = @request_payload[:email]
      password = @request_payload[:password]
      #id = User.find_id_by_mail(email) # No esta mal solo el read.
      # instancia = User.filter({email => ...})
      id = User.filter({"@email"=>email})
      puts id
      user = User.find(id)
      if user.nil?
        halt 401
      elsif user.password != password || password.nil?
        halt 403
      end
      user.log_result.to_json
    end