class API(Resource):
    # create a parser object
    parser = reqparse.RequestParser()
    # add agruments to the parser object
    parser.add_argument('account_id', type=str, required=False, help="Please define 'account_id'")
    parser.add_argument('username', type=str, required=False, help="Please define 'username'")
    parser.add_argument('password', type=str, required=False, help="Please define 'password'")

    # authenticate users
    def post(self, name):
        first_data = API.parser.parse_args()
        print("First data", first_data)
        if first_data:
            users.insert_one({i: j for i, j in first_data.items()})
        credentials = users.find_one({})
        account_id = credentials['account_id']
        username = credentials['username']
        password = credentials['password']
        if name == "allapps":
            status_code, result = authenticate_user(account_id, username, password)
            if status_code == 200:
                return {"information": result}, status_code
            return {"message": "Please enter correct credentials"}, status_code

First data {'account_id': 'sderre456433', 'password': '5464ewsd', 'username': 'sdfsd543ry6'}