Allows you to add another client with a corresponding logo and a billing type.
Customers have the following format:
{
"id": int64,
"name": string,
"name_displayed": string,
"description": string,
"currentlyUsed": bool,
"logo_url": "",
"UserId": int64,
"regexEmail": string,
"CountQuotasEmailSent": int64,
"QuotaEmailSent": int64,
"typeBilling": string,
"organisationId": int64,
"old_organisation_id": int64,
"hash": string,
"type_of_customer": string,
"evil_proxy_ip": string,
"customer_parent": {}CustomerParent,
"customer_parent_id": int64,
"creation_time": string(datetime),
"whitelabeled": false,
"default_language": string,
"gtp_service": string
}