I have the following form:

<%= form_for @conn, Routes.auth_path(@conn, :request, "passwordless"), [method: :get], fn f -> %>
<%= hidden_input f, :redirect_url, value: Routes.page_path(@conn, :login_mail_sent) %>
<%= email_input f, :email, placeholder: "Your email address", required: :true %>
<%= submit "Log in" %>
<% end %>

Now if I try to submit the form with the email field input empty, I’ll get a small error bubble from Phoenix with something saying: “Please, fill out this field.”

Could anyone please tell me how can I translate this error message?

I know I can use gettext but I do not understand where should I call the gettext function since the string “Please fill out this field” is not written anywhere in the code.