How to setup tables/rows for flask app in Heroku postgreSQL database - flask-sqlalchemy

Question

I am currently trying to set up my database tables/rows for a PostgreSQL/Flask app that I recently deployed to Heroku, but am unsure of how to go about it. Here are my tables in the models.py file:
class User (db.Model):
"""User in the system"""
__tablename__ = "users"
id = db.Column(
db.Integer,
primary_key=True
)
firstname = db.Column(
db.Text,
nullable=False
)
lastname = db.Column(
db.Text,
nullable=False
)
username = db.Column(
db.Text,
nullable=False,
unique=True
)
email = db.Column(
db.Text,
nullable=False,
unique=True
)
password = db.Column(
db.Text,
nullable=False
)
image = db.Column(
db.Text
)
state = db.Column(
db.Text,
nullable=False
)
vax_date = db.Column(
db.Text
)
covid_status = db.Column(
db.Text
)
review = db.relationship('Review', backref='users')
#classmethod
def signup(cls, firstname, lastname, username,
email, password, image, state, vax_date, covid_status):
"""Sign up user. Hashes password and adds user to system."""
hashed_pwd = bcrypt.generate_password_hash(password).decode('UTF-8')
user = User(
firstname=firstname,
lastname=lastname,
username=username,
email=email,
password=hashed_pwd,
image=image,
state=state,
vax_date=vax_date,
covid_status=covid_status)
db.session.add(user)
return user
#classmethod
def authenticate(cls, username, password):
user = cls.query.filter_by(username=username).first()
if user:
is_auth = bcrypt.check_password_hash(user.password, password)
if is_auth:
return user
return False
class Review (db.Model):
"""Reviews made by users for testing locations"""
__tablename__ = "reviews"
id = db.Column(
db.Integer,
primary_key=True
)
location = db.Column(
db.Text,
nullable=False
)
description = db.Column(
db.Text,
nullable=False
)
user_id = db.Column(
db.Integer,
db.ForeignKey('users.id', ondelete='CASCADE'),
nullable=False
)
user = db.relationship('User', backref="reviews", passive_deletes=True)
Right now when I try to create a user, I am able to create an account, but certain features do not work and I keep losing the user's session. I understand that this stems from the tables/rows not being created. How can I set this information up on my Heroku database?
UPDATE
after running heroku run python manage.py shell and db.create_all() I receive nothing. Here is a photo:
photo