created and added the Author model

lancedamalerio_reading/bookshelf/models.py

 from django.db import models
 
-# Create your models here.
+#Author
+#first_name; last_name; age; nationality; bio
+
+class Author(models.Model):
+    first_name = models.CharField(max_length = 50)
+    last_name = models.CharField(max_length = 50)
+    age = models.IntegerField(default = 0)
+    nationality = models.CharField(max_length = 50)
+    bio = models.CharField(max_length = 700)
+