def login():
if g.user is not None and g.user.is_authenticated():
return redirect(url_for('profile'))
form = LoginForm(request.form)
if form.validate_on_submit(): # if the data is valid
username=request.form["user_name"]
user=Users.query.filter_by(user_name=username).first()
if user is None:
user=Users(user_name=username)
db.session.add(user)
db.session.commit()
login_user(user)
posts=user.followed_posts().all()
return render_template("profile.html", user=user, posts=posts)
return render_template("login.html", form=form)
