post https://gw.edu-nation.net/api/grades_groups
Returns list of grade groups that you can access.
You can use the "additional_fields" parameter to include more fields in the JSON results. Check the /fields service to explore the additional fields that you can add.
Example:
{
"additional_fields":"customField_35,idnumber,countryName"
}
Rate Limit: LIGHT
Permission needed: Update grades in grade groups (#306)
Reference Code: srv_335