API-Changelog 
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Added

/api/invoice
GET: added

/api/invoicedata
GET: added

/api/invoicegroups
GET: added
POST: added
DELETE: added

/api/invoicegroups/{invoicegroup_id}
GET: added
PATCH: added
DELETE: added

/api/invoicegroups/names
GET: added

/api/tariffs
GET: added
POST: added
DELETE: added

/api/tariffs/{tariff_id}
GET: added
PATCH: added
DELETE: added

/api/tariffs/names
GET: added

/api/customers
GET: added
POST: added
DELETE: added

/api/customers/{customer_id}
GET: added
PATCH: added
DELETE: added

/api/customers/names
GET: added

/api/currencies
GET: added
POST: added
DELETE: added

/api/currencies/{currency_id}
GET: added
PATCH: added
DELETE: added

/api/randomizer
GET: added

/api/randomizer/{user_id}
GET: added

/api/randomizer/massupdate
GET: added

/api/vpn
GET: added
PATCH: added
DELETE: added

/api/weathersensors
GET: added

/api/weathersensors/{weathersensor}
GET: added
PATCH: added

Changed

/api/backup
GET: Response changed
POST: Request changed, Response changed

/api/doorlocks
GET: Response changed

/api/security
GET: Response changed
PATCH: Request changed, Response changed

/api/users
POST: Response changed

/api/users/{user_id}
GET: Response changed
PATCH: Request changed, Response changed

/api/users/massedit
POST: Response changed

Removed

/api/redundancy
Removed