logout button and user in navbar

work/models.py

@@ -1,9 +1,13 @@
 from django.db import models
 import datetime
+from django.core.validators import MaxValueValidator, MinValueValidator
 
 
 class HoursInput(models.Model):
     date = models.DateField(default=datetime.date.today)
-    hours_number = models.IntegerField()
+    hours_number = models.IntegerField(validators=[
+        MaxValueValidator(15, "Niemożliwe, że tyle pracowałeś"),
+        MinValueValidator(0, "Wprowadź liczbę dodatnią 0-15")
+    ])
     workplace = models.CharField(max_length=100)