====/itg/getrelations====
Retrieve relation data of 1 relation, all relations or all realtions updated since a specific date.

parameters:
|auth	|the authorisation code you received from Intogolf BV (mandatory) (you need autorisation level 3 for this API)|
|relnr	|retrieve 1 (possibly more if duplicates exist) golfer with ikgagolfen id|
|relnrlocal	|retrieve 1 golfer with this local id within the domain of the golfcourse|
|mbrcode   |retrieve the golfer(s) with this membercode|
|ngfnumber   |retrieve the golfer(s) with this ngf number|
|debtorid   |retrieve the golfer(s) with this debtorid|
|externalid   |retrieve the golfer(s) with this externalid|
|datefrom	|retrieve data of all golfers changed since this date (format yyyymmdd)|


If only the auth parameter is provided, all non-deleted golfers are returned.

If a wrong authorisation code is provided, the backend will return 401,“Unauthorized”

example: https://backend.intogolf.com/itg/getrelations?auth=<your authorisation code>&relnr=659764

result:
<code>
{

    "getrelations": [
        {
            "relnr": 999999,
            "relnrlocal": 1,
            "type": 0,
            "lastname": "Knol",
            "initials": "R",
            "prefix": "",
            "firstname": "Richard",
            "rtlnr": 1,
            "address1": "Moerstraat 7",
            "address2": "",
            "city": "Rotterdam",
            "postalcode": "0000TT",
            "isocountry": "NL",
            "phone": "123456789",
            "phonemobile": "123456789",
            "phonework": "123456789",
            "fax": "123456789",
            "email": "helpdesk@intogolf.com",
            "emailwork": "",
            "datebirth": "19650225",
            "handicap": 18.2,
            "ngfnumber": "913753",
            "externalid": "",
            "debtorid": "5",
            "maxcredit": 0,
            "value1": "",
            "value2": "",
            "value3": "",
            "companyrelnrlocal": 3,
            "debtorrelnrlocal": 0,
            "mailrelnrlocal": 0,
            "language": 2,
            "bankaccount": null,
            "vatid": null,
            "mbrcode": "KNOL01",
            "membertype": "PL",
            "relationtype1": 0,
            "relationtype2": 0,
            "relationtype3": 0,
            "default_greenfee": 0,            
            "deleted": 0
        }
    ]

}</code>


|initials|if the relation is a company, this field will be filled with an optional 2nd line of the company name|
|type  |0 - person, 1 - company|
|rtlnr  |1 - male, 2 - female|
|isocountry  |2 letter country code|
|datebirth  |dateformat yyyymmdd|
|language  |2 dutch, 1 english|