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https://detect.expert/api/v1/GET **/**users/balanceRetrieve account balance.
POST **/**numbers/Book a number:
{
"product": "str",
"service_code": "str",
"country_code": 0,
"period_code": 0
}
product: Can only be residental or mixin.service_code: Can be retrieved using GET /numbers/mixed/.country_code: Can be retrieved using GET /numbers/mixed/countries/.period_code: Needed when product=residential.GET /numbers/mixen/countries/Get list of countries.