Use invite template

app/views/devise/mailer/_password_change_forgotten.html.erb

@@ -0,0 +1,8 @@
+<p>Hello <%= @resource.email %>!</p>
+
+<p>Someone has requested a link to change your password. You can do this through the link below.</p>
+
+<p><%= govuk_link_to 'Change my password', edit_password_url(@resource, reset_password_token: @token) %></p>
+
+<p>If you didn't request this, please ignore this email.</p>
+<p>Your password won't change until you access the link above and create a new one.</p>

app/views/devise/mailer/_password_change_initial.html.erb

@@ -0,0 +1,6 @@
+<p>Hello <%= @resource.name %>!</p>
+
+<p>An account has been created for you to submit CORE data on behalf of @resource.organisation.</p>
+
+<p>Your username is <% @resource.email %>, use the link below to set your password.
+<p><%= govuk_link_to 'Change my password', edit_password_url(@resource, reset_password_token: @token) %></p>

app/views/devise/mailer/reset_password_instructions.html.erb

@@ -1,8 +1,5 @@
-<p>Hello <%= @resource.email %>!</p>
-
-<p>Someone has requested a link to change your password. You can do this through the link below.</p>
-
-<p><%= govuk_link_to 'Change my password', edit_password_url(@resource, reset_password_token: @token) %></p>
-
-<p>If you didn't request this, please ignore this email.</p>
-<p>Your password won't change until you access the link above and create a new one.</p>
+<% if @resource.last_sign_in_at.nil? %>
+  <%= render partial: "password_change_initial" %>
+<% else %>
+  <%= render partial: "password_change_forgotten" %>
+<% end %>

spec/requests/auth/passwords_controller_spec.rb

@@ -32,7 +32,7 @@ RSpec.describe Auth::PasswordsController, type: :request do
   end
 
   context "when a password reset is requested the email" do
-    let(:user) { FactoryBot.create(:user) }
+    let(:user) { FactoryBot.create(:user, last_sign_in_at: Time.zone.now) }
     let(:email) { user.email }
 
     it "should contain the correct email" do