====/igg/golferregistrations====
Gives a list of all the golfcourses and clubs at which the user is known in their local database.

parameters:
|auth	|the authorisation code you received from Intogolf BV (mandatory)|
|relnr	|client id of the user (mandatory)|
|relkey	|the hash key that was provided upon login (mandatory if relnr>0)|
|crsnr	|limit the results to only this course|

example: https://backend.ikgagolfen.nl/igg/golferregistrations?auth=<your authorisation code>&relnr=686095

result:
<code>{
  "golferregistrations": [
    {
      "crsnr": 64,
      "crsshortname": "bentwoud",
      "crsname": "Golfbaan Bentwoud",
      "grpname": "greenfeespeler"
    },
    {
      "crsnr": 57,
      "crsshortname": "hitland",
      "crsname": "Golfbaan Hitland",
      "grpname": "niet-leden midweek"
    }
  ]
}
</code>
if a wrong authorisation code is provided, the backend will return “no authorisation”