Addition of ScaleIO Kubernetes Volume Plugin

This commits implements the Kubernetes volume plugin allowing pods to seamlessly access and use data stored on ScaleIO volumes.

vendor/github.com/codedellemc/goscaleio/user.go

@@ -0,0 +1,35 @@
+package goscaleio
+
+import (
+	"fmt"
+
+	types "github.com/codedellemc/goscaleio/types/v1"
+)
+
+func (system *System) GetUser() (user []types.User, err error) {
+	endpoint := system.client.SIOEndpoint
+	endpoint.Path = fmt.Sprintf("/api/instances/System::%v/relationships/User", system.System.ID)
+
+	req := system.client.NewRequest(map[string]string{}, "GET", endpoint, nil)
+	req.SetBasicAuth("", system.client.Token)
+	req.Header.Add("Accept", "application/json;version="+system.client.configConnect.Version)
+
+	resp, err := system.client.retryCheckResp(&system.client.Http, req)
+	if err != nil {
+		return []types.User{}, fmt.Errorf("problem getting response: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if err = system.client.decodeBody(resp, &user); err != nil {
+		return []types.User{}, fmt.Errorf("error decoding instances response: %s", err)
+	}
+
+	// bs, err := ioutil.ReadAll(resp.Body)
+	// if err != nil {
+	// 	return types.User{}, errors.New("error reading body")
+	// }
+	//
+	// fmt.Println(string(bs))
+	// return types.User{}, nil
+	return user, nil
+}