Added widgetuser-add.html template

widget_bigdjangoenergy/dashboard/templates/dashboard/widgetuser-add.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}Add Widget User{% endblock %}
+
+{% block heading %}Add a new widget user:{% endblock %}
+{% block content %}
+    <form method="POST">
+        {% csrf_token %}
+        {{ form.as_p }}
+        <input type="Submit" value="Add Widget User">
+    </form>
+{% endblock %}
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