single login page in devise gem for two type of user

Using Devise gem :-

in my application i have two type user 1) Company 2) Employee

i have two separate model for both user and i want to give single sign-in page for both user

i already generate different views for both user using devise but then also i need single sign-in.

so how it is possible please help me out...!!!!!!!!!

i try this:- controllers/compnaies/sessions_controller.rb

def create
  @employee = Employee.new
  @company = Company.new
  if @company.email_exist?(params[:company][:email])
    super
  elsif @employee.email_exist?(params[:company][:email])
    params[:employee]=params[:company]
    redirect_to employee_session_path(params)
  end
end

employee_session_path is the path of employees's sessions create method but it always call new method of employees's sessions

controllers/employees/sessions_controller.rb

def create
 super
end

email_exist? method check the email id in both model which is provided by any of user

in my model:

company.rb

def email_exist?(email)
  if Company.find_by(email: email)
   return true
  end
end

employee.rb

def email_exist?(email)
  if Employee.find_by(email: email)
   return true
  end
end

Thanks in advance...!!!!!!!!