No response on attempt to update user

Hi,

I’m prototyping an application in C# to make changes to our wordpress site through the api.

I have been able to successfully create/delete users and posts using a http client. Furthermore, I have been able to make updates to posts. But have had difficulty in updating users through the api. While testing the endpoint using postman, it is telling me it “could not get any response”.

I have used a variety of methods to make the request to the API, with each throwing exceptions indicating that the connection had been closed unexpectedly.

WP version: 4.7.2
Using Oauth 1.0a
Sending JSON data

As I am able to use the other endpoints OK, the situation has me a bit stumped. I’ve had a good hunt around, but can’t seem to find anything that will help me out. If I’ve missed something obvious, then apologies in advance.

Thanks