モデルを複数用意した際のログイン機能実装について

　get "login", to: 'sessions#new'
  post "login", to: 'sessions#create'
  delete "logout", to: 'sessions#destroy'

　def create
    email = params[:session][:email].downcase
    password = params[:session][:password]
    if login(email, password)
      flash[:success] = "ログインに成功しました"
      redirect_to @user
    else
      flash.now[:danger] = "ログインに失敗しました"
      render :new
    end
  end

  def destroy
    session[:user_id] = nil
    flash[:success] = "ログアウトしました"
    redirect_to root_url
  end

  private

  def login(email, password)
    @user = User.find_by(email: email)
    if @user && @user.authenticate(password)
      session[:user_id] = @user.id
      return true
    else
      return false
    end
  end

　　<%= form_with(url: login_path, scope: :session, local: true) do |f| %>
      <div class="form-group">
        <%= f.label :email, 'Email' %>
        <%= f.email_field :email, class: 'form-control' %>
      </div>

      <div class="form-group">
        <%= f.label :password, 'Password' %>
        <%= f.password_field :password, class: 'form-control' %>
      </div>

      <%= f.submit 'Log in', class: 'btn btn-primary btn-block' %>
    <% end %>