feat: save channel or scene as register channel

uni_modules/uni-id-pages/uniCloud/cloudfunctions/uni-id-co/lib/utils/register.js

@@ -88,12 +88,14 @@ async function postRegister (params = {}) {
     appVersion,
     appVersionCode,
     channel,
+    scene,
     clientIP,
     osName
   } = this.getClientInfo()
 
   Object.assign(user, extraData)
 
+  const registerChannel = channel || scene
   user.register_env = {
     appid: appId || '',
     uni_platform: this.clientPlatform || '',
@@ -101,7 +103,7 @@ async function postRegister (params = {}) {
     app_name: appName || '',
     app_version: appVersion || '',
     app_version_code: appVersionCode || '',
-    channel: channel ? channel + '' : '', // channel可能为数字，统一存为字符串
+    channel: registerChannel ? registerChannel + '' : '', // channel可能为数字，统一存为字符串
     client_ip: clientIP || ''
   }