If I change the number of points for a username, it doesn't update my database to the highest points holder.

from peewee import *

db = SqliteDatabase('students.db')

class Student(Model):
    username = CharField(max_length=255, unique=True)
    points = IntegerField(default=0)

    class Meta:
        database = db

students = [
   {'username': 'jeremy',
    'points': 1400},
    {'username': 'matt',
    'points': 11912},
    {'username': 'kevin',
     'points': 7363},
    {'username': 'annie',
     'points': 4079},
    {'username': 'steve',
     'points': 14717}
]        

def add_students():
    for student in students:
        try:
            Student.create(username = student['username'],
                          points = student['points'])
        except IntegrityError:
            student_record = Student.get(username = student['username'])
            student_record_points = student['points']
            student_record.save()

def top_student():
    student = Student.select().order_by(Student.points.desc()).get()
    return student

if __name__ == '__main__':
    db.connect()
    db.create_tables([Student], safe=True)
    add_students()
    print("Our top student right now is: {0.username}.".format(top_student()))