Loads a record of a specific app config from brixxbox server by a specified field and returns a promise. This is a async function. You have to await the result, if you want to use it.
configName - the name of the app
keyField - the search field
value - value to search for
The result is a brixxbox record object. All fieldvalues of that record are stored in data as key value pairs. (e.g. myRecord.data.addressName). The id of the record can be found in myRecord.id.