def registration():
    data = request.data
    dataDict = json.loads(data.decode('utf-8'))
    if UserModel.find_by_username(dataDict['username']):
        return json.dumps({'message': 'User {} already exists'.format(dataDict['username']),'access_token':'NA'},ensure_ascii=False)

    new_user = UserModel(
        username = dataDict['username'],
        password = UserModel.generate_hash('borrar_campo_bs')
    )


    try:
        new_user.save_to_db()
        access_token = create_access_token(identity = dataDict['username'])
        refresh_token = create_refresh_token(identity = dataDict['username'])
        return json.dumps({
            'message': 'User {} was created'.format(dataDict['username']),
            'access_token': access_token,
            'refresh_token': refresh_token
            },ensure_ascii=False)
    except:
        return json.dumps({'message': 'Something went wrong','access_token':'NA'},ensure_ascii=False), 500