Unicode usernames

I tried and seems not working for me either

if applying .encode() to the chinese characters username, or urllib.parse.quote()

    headers = {
        'Api-Key': API_KEY,
        'Api-Username': '大帅哥'.encode()
    }

    # or urllib parse
    headers = {
        'Api-Key': API_KEY,
        'Api-Username': urllib.parse.quote(API_USERNAME)
    }

I will get error

Failed to create post. Status code: 403
{'errors': ['您没有权限查看请求的资源。API 用户名或者密钥无效。'], 'error_type': 'invalid_access'}

but, without .encode()

    headers = {
        'Api-Key': API_KEY,
        'Api-Username': '大帅哥'
    }

I will get error

UnicodeEncodeError: 'latin-1' codec can't encode characters in position 0-2: ordinal not in range(256)