This is my server action:

const submitForm = async (formData: FormData) => {
    'use server'

    const email = formData.get('email') as string
    const password = formData.get('password') as string

    if (email !== '' && password !== '') {
      const signInResult = await signIn({ email, password })
      if (signInResult.ok) {
        redirect('/')
      }
    }
  }

I wonder how to keep the form fields' values present?

Thank you!