Zoho campaigns API createCampaign returns INVALID_METHOD

Hi there,

I'm trying to create campaigns using the API, but I hit this error, that is not documented anywhere.

url: ://campaigns.zoho.com/api/v1.1/createCampaign?resfmt=json&...

authenticated for v1.1, I get responses for other calls

the response I get is:

{

["message"]=>

string(0) ""

["version"]=>

string(3) "1.1"

["URI"]=>

string(24) "/api/v1.1/createCampaign"

["Code"]=>

string(14) "INVALID_METHOD"

["status"]=>

string(5) "error"

}