Reduce initial number of owners and specify default domain

The new client won't show up on the dashboard if the user's domain isn't in the 'allowed domains'. This may not be preferred behaviour, but short term I've worked around it by defaulting 'allowed domains' to the user's.

templates/dashboard.html

@@ -26,9 +26,7 @@ <h2 class="govuk-heading-l">Dashboard</h2>
   <h2 class="govuk-heading-l">Applications</h2>
   <div>
   {%- if allowed_apps %}
-      <p>{{ allowed_apps }}</p>
     {%- for a in allowed_apps %}
-        <p>{{ a }}</p>
       {%- set app = allowed_apps[a] %}
       {%- if app["name"] and ((app["sign_in_url"] and app["dashboard_display"]) or app["can_manage"]) %}
       <div>

templates/new-client.html

@@ -49,10 +49,10 @@ <h1 class="govuk-fieldset__heading">
     <input class="govuk-input govuk-!-width-two-thirds" id="sign-in-url" name="sign_in_url" type="text">
   </div>
   <div class="govuk-form-group">
-    <label class="govuk-label" for="owners">
-      Owner(s). On the next page, you'll be able to add more owners.
+    <label class="govuk-label" for="owner">
+      Initial owner. On the next page, you'll be able to add more owners.
     </label>
-    <input class="govuk-input govuk-input--width-10" id="owners" name="owners" type="text">
+    <input class="govuk-input" id="owner" name="owner" type="text">
   </div>
 </fieldset>
         <div class="govuk-button-group">

wsgi.py

@@ -1412,9 +1412,10 @@ def new_client():
         client_id = client_secret_dict.get("client_id")
         client_secret = client_secret_dict.get("client_secret")
         request_dict = request.form.to_dict()
+        user_domain = request_dict.get("owner").split("@")[1]
         sso_oidc.save_client(
             filename=f"{request_dict['app_url']}_{uuid.uuid4().hex}.json",
-            client={"secret": client_secret, **request_dict},
+            client={"secret": client_secret, "allowed_domains": [user_domain], **request_dict},
             client_id=client_id
         )
         return redirect(f"/view?client_id={client_id}")