endpoint shows null flask pymongo

Question

I've created database and tables in mongoDB and inserted some values to check. But when i am putting http://127.0.0.1:5000/user it shows me null. enter image description here

enter image description here

Even it show's me HTTP:200

main.py:

load_dotenv()

app = Flask(__name__)
api = Api(app)

app.config["MONGO_URI"] = 'mongodb+srv://kawwaison:******@plent.mmmn3.mongodb.net/myFirstDatabase?retryWrites=true&w=majority'
app.config["MONGO_DBNAME"] = 'plent'

mongo = PyMongo(app)

user_put_args = reqparse.RequestParser()
#arguments
event_put_args = reqparse.RequestParser()
#arguments
event_user_put_args = reqparse.RequestParser()

class User(Resource):
    def post(self):
        args = user_put_args.parse_args()
        if len(list(mongo.db.user.find({'studentId': args['studentId']}))) == 0:
            args['events'] = []
            organisers_f = open(f'{os.path.dirname(os.path.abspath(__file__))}/organisers.txt', 'r')
            organisers = [l.strip() for l in organisers_f.readlines()]
            args['permission'] = 0

            if args['studentId'] in organisers:
                args['permission'] = 1
                args['organisedEvents'] = []

            result = mongo.db.user.insert_one(args)
            print(result.inserted_id)

            return {'id': str(result.inserted_id), 'permission': args['permission']}

    def put(self):
        args = user_put_args.parse_args()
        mongo.db.user.update_one({'_id': ObjectId(args['id'])}, {'$set': {'email': args['email'], 'name': args['name'], 'studentId': args['studentId']}})

        return {'success': True}

    def get(self):
        email = request.args.get('email')
        user = mongo.db.user.find_one({'email': email})
        if user != None:
            user['id'] = str(user['_id'])
            del user['_id']

            user['events'] = [str(e) for e in user['events']]
            if 'organisedEvents' in user.keys():
                user['organisedEvents'] = [str(e) for e in user['organisedEvents']]

        return user