fixes in the repr

portal/database/models.py

@@ -31,12 +31,14 @@ def _repr(instance) -> str:
     Returns(str): String representation of the model
     """
     no_include = {'password_hash', 'review', 'course', 'user', 'project', 'group', 'role',
-                  'review_items'}
+                  'review_items', 'client', 'EXCLUDED'}
     if 'EXCLUDED' in vars(instance.__class__):
         no_include.update(instance.__class__.EXCLUDED)
     result = f"{instance.__class__.__name__}: "
-    for key, value in vars(instance).items():
+    for key in dir(instance):
         if not key.startswith("_") and key not in no_include:
+            value = getattr(instance, key)
+            if not callable(value):
                 result += f"{key}={value} "
     return result
 
@@ -142,13 +144,13 @@ class Client(db.Model):
         return self.id == eid
 
 
-class Secret(db.Model):
+class Secret(db.Model, EntityBase):
     __tablename__ = 'secret'
+    EXCLUDED = ['value', 'client']
     id = db.Column(db.String(length=36), default=lambda: str(
         uuid.uuid4()), primary_key=True)
     name = db.Column(db.String(40), nullable=False)
     value = db.Column(db.String(120))
-    created_at = db.Column(db.TIMESTAMP, default=db.func.now())
     expires_at = db.Column(db.TIMESTAMP, nullable=True)
 
     client_id = db.Column(db.String(36), db.ForeignKey(