Update announcements/models.py, announcements/admin.py, widget_placeholdername/settings.py files

announcements/admin.py

 from django.contrib import admin
 
 # Register your models here.
+from .models import Announcement
+
+admin.site.register(Announcement)
\ No newline at end of file

announcements/models.py

 from django.db import models
 
 # Create your models here.
+class Announcement(models.Model):
+    announcement_title = models.CharField(max_length=50)
+    announcement_body = models.CharField(max_length=500)
+    pub_date = models.DateTimeField("date published")

widget_placeholdername/settings.py

@@ -35,6 +35,7 @@ ALLOWED_HOSTS = []
 
 INSTALLED_APPS = [
     'homepage.apps.HomepageConfig',
+    'announcements.apps.AnnouncementsConfig',
     'Forum.apps.ForumConfig',
     'assignments.apps.AssignmentsConfig',
     'django.contrib.admin',