added author field and __str__ method to Announcement model

announcements/models.py

 from django.db import models
 
+from homepage.models import WidgetUser
+
 
 class Announcement(models.Model):
   announcement_title = models.CharField(max_length=200)
   announcement_body = models.TextField()
   pub_date = models.DateField(auto_now_add=True)
+  author = models.ForeignKey(WidgetUser, on_delete=models.CASCADE, null=True)
+
+  def __str__(self):
+    return self.announcement_title
 
 class Reaction(models.Model):
   class ReactionNames(models.TextChoices):