get https://api02.naturalhr.net/api/v1/salary-history
REMEMBERHistory endpoints return string values and not system ID's for fields such as job grade, change reason and so on
fieldname  | format  | example  | 
|---|---|---|
change_date  | yyyy-mm-dd  | 2020-12-04  | 
change_reason  | integer (Lookup value)  | 123  | 
