class UserLogin(Resource):
    def post(self):
        data = parser.parse_args()
        current_user = UserModel.find_by_username(data['username'])
        if not current_user:
            return {'message': 'User {} doesn\'t exist'.format(data['username'])}

        if data['password'] == current_user.password:
            return {'message': 'Logged in as {}'.format(current_user.username)}
        else:
            return {'message': 'Wrong credentials'}