DatePreset in AdSet has wrong values?

[zdendos]

I noted, that values in DatePreset in AdSet class ( https://github.com/facebook/facebook-python-business-sdk/blob/main/facebook_business/adobjects/adset.py ) have upper case values. I think that here should be lower case values.

When I will call function get_ad_sets with:

params = {
    'date_preset': AdSet.DatePreset.last_90d,
}

I will get this response:

Status: 400
Response:
{
"error": {
"message": "(#100) date_preset must be one of the following values: today, yesterday, this_month, last_month, this_quarter, maximum, data_maximum, last_3d, last_7d, last_14d, last_28d, last_30d, last_90d, last_week_mon_sun, last_week_sun_sat, last_quarter, last_year, this_week_mon_today, this_week_sun_today, this_year",
"type": "OAuthException",
"code": 100,
"fbtrace_id": "A1IbYeQ5SubADE2urVX8FHV"
}
}

But when I wil do same with `Ad.DatePreset.last_90d' then all working well + I will get this warning:
UserWarning: value of date_preset might not be compatible. Expect date_preset_enum; got <class 'str'>
warnings.warn(message)