vendor: add github.com/koofr/go-koofrclient

* added koofr client SDK dep for koofr backend

vendor/github.com/koofr/go-koofrclient/client_user.go

@@ -0,0 +1,20 @@
+package koofrclient
+
+import (
+	"github.com/koofr/go-httpclient"
+	"net/http"
+)
+
+func (c *KoofrClient) UserInfo() (user User, err error) {
+	request := httpclient.RequestData{
+		Method:         "GET",
+		Path:           "/api/v2/user",
+		ExpectedStatus: []int{http.StatusOK},
+		RespEncoding:   httpclient.EncodingJSON,
+		RespValue:      &user,
+	}
+
+	_, err = c.Request(&request)
+
+	return
+}