====/igg/pros====
Retrieve a list of all golf professionals (tutors) for a specific course.

parameters:
|auth	|the authorisation code you received from Intogolf BV (mandatory)|
|crsnr	|the id of the course (mandatory)|

example: https://backend.ikgagolfen.nl/igg/pros?auth=<your authorisation code>&crsnr=58

result:
<code>{
  "pros": [
    {
      "pronr": 183253,
      "proname": "Sascha Labrujere"
    }
  ]
}</code>

if a crsnr that does not allow lesson bookings is provided, the backend will return “no lessons for this course”

if a wrong authorisation code is provided, the backend will return “no authorisation”