add leading zeros to project PID

input/models.py

@@ -77,7 +77,7 @@ class Project(Volunteer):
     def save(self,*args,**kwargs):
         # is there a way to call super().save() only once?
         super().save(*args,*kwargs)
-        self.pid = self.account + str(self.pk)
+        self.pid = self.account + str(self.pk).zfill(3)
         super().save(*args,*kwargs)
 
     def __str__(self):