Username on the first registration page is optional

Author: sandhose

templates/pages/register.html

@@ -28,7 +28,7 @@ <h1 class="title">{{ _("mas.register.create_account.heading") }}</h1>
 
     {% if features.password_registration %}
       {% call(f) field.field(label=_("common.username"), name="username", form_state=form) %}
-        <input {{ field.attributes(f) }} class="cpd-text-control" type="text" autocomplete="username" autocorrect="off" autocapitalize="off" required />
+        <input {{ field.attributes(f) }} class="cpd-text-control" type="text" autocomplete="username" autocorrect="off" autocapitalize="off" />
         <div class="cpd-form-message cpd-form-help-message" id="{{ f.id }}-help">
           @username:{{ branding.server_name }}
         </div>