Update Organisation Key

This work similar to Keys API except that Key ID is always equals Organisation ID

For Gateway v2.6.0 onwards, you can now set rate limits at the organisation level by using the following fields - allowance and rate. These are the number of allowed requests for the specified per value, and need to be set to the same value. If you don’t want to have organisation level rate limiting, set rate or per to zero, or don’t add them to your request.