def apikey(request):
    """Return an api_key for OpenWeatherMap API."""
    # available free api keys :
    #  ae0c16c7a7c591f9d88e50954c9b2c0b, b6907d289e10d714a6e88b30761fae22,
    #  b1b15e88fa797225412429c1c50c122a1, ...
    return 'ae0c16c7a7c591f9d88e50954c9b2c0b'