Use API_URL_SUFFIX_V3 (mattermost)

matterclient/matterclient.go

@@ -159,11 +159,11 @@ func (m *MMClient) Login() error {
 	m.Client.SetTeamId(m.Team.Id)
 
 	// setup websocket connection
-	wsurl := wsScheme + m.Credentials.Server + model.API_URL_SUFFIX + "/users/websocket"
+	wsurl := wsScheme + m.Credentials.Server + model.API_URL_SUFFIX_V3 + "/users/websocket"
 	header := http.Header{}
 	header.Set(model.HEADER_AUTH, "BEARER "+m.Client.AuthToken)
 
-	m.log.Debug("WsClient: making connection")
+	m.log.Debugf("WsClient: making connection: %s", wsurl)
 	for {
 		wsDialer := &websocket.Dialer{Proxy: http.ProxyFromEnvironment, TLSClientConfig: &tls.Config{InsecureSkipVerify: m.SkipTLSVerify}}
 		m.WsClient, _, err = wsDialer.Dial(wsurl, header)