Added users support

app/controllers/sessions_controller.rb

@@ -0,0 +1,25 @@
+class SessionsController < ApplicationController
+  skip_before_action :require_login, only: %i[new create]
+
+  def new
+  end
+
+  def create
+    user = User.find_by_login(params[:login])
+
+    if user&.authenticate(params[:password])
+      session[:user_id] = user.id
+      session[:company_id] = user.company_id
+      redirect_to root_path, notice: t('sessions.login_successful')
+    else
+      flash.now[:alert] = t('sessions.invalid_credentials')
+      render :new, status: :unprocessable_entity
+    end
+  end
+
+  def destroy
+    session[:user_id] = nil
+    session[:company_id] = nil
+    redirect_to login_path, notice: t('sessions.logout_successful')
+  end
+end