Fix checking if app exists before inserting into DB

cliapp/cliapp/cli.py

@@ -57,13 +57,15 @@ def create_app(slug, name):
     obj.name = name
     obj.slug = slug
 
-    app = db.session.query(App).filter_by(slug=slug).first()
+    app_obj = App.query.filter_by(slug=slug).first()
 
-    if app is not None:
-        db.session.add(obj)
-        db.session.commit()
-    else:
+    if app_obj:
         current_app.logger.info(f"App definition: {name} ({slug}) already exists in database")
+        return
+    
+    db.session.add(obj)
+    db.session.commit()
+    current_app.logger.info(f"App definition: {name} ({slug}) created")