json not being passed to request

[warroyo]

I am trying to make POST request with a json body. I have created a struct(see below) and i have set the debug output. Below is my code and results. it seems like the json is never getting parsed? the body is empty when i show the debug output.

code:

type NewServiceJson struct {
    name       string
    space_guid string
    credentials map[string]string
}

jsonvalue := NewServiceJson{name: serviceUpdates.Service.Name, space_guid: cfinfo.Space.Guid, credentials: serviceUpdates.Service.Credentials}
    res, err := goreq.Request{
        Method:    "POST",
        Uri:       cfinfo.ApiEndpoint + "/v2/user_provided_service_instances",
        Body:      jsonvalue,
        Accept:    "application/json",
        Insecure:  true,
        ShowDebug: true,
    }.WithHeader("Authorization", "Bearer "+cfinfo.BearerToken).Do()
    fmt.Println(res, err)

output:

016/02/05 17:16:38 POST /v2/user_provided_service_instances HTTP/1.1
Host: myhost.com
Accept: application/json
Authorization: Bearer [SECRET DATA REMOVED]
{}
&{0xc8200866c0  0xc8200c0740 0xc8200f81c0} <nil>

[marcosnils]

@warroyo struct fields need to be public (first letter uppercased) so they can be marshalled