WeChat Connect
To use WeChat as a social login provider, you will need an App ID and App Secret from your WeChat app, then copy these keys into your ReachFive settings.
This docs detail steps by steps how to create a WeChat App and connect it to your ReachFive account.
Developer Access
Log onto WeChat.

Go to Admin Center > Website Application and click on CreateWebsite Application button.

Create website application (Step 1)
In the first step of the app creation process, you need to fill in basic info.

You have to fill out the WeChat registration form to pass the audit process.
Create website application (Step 2)

In the next screen, add https://{REACHFIVE_DOMAIN}/login/callback
on the Authorization callback domain input, where REACHFIVE_DOMAIN
is your ReachFive domain.
You can’t add staging AND production URL. You need to create another app for staging purpose.
Click on Submit for audit. WeChat takes approximately 7 days to validate this process.
Configure WeChat as Provider on ReachFive
Return to Admin Center > Website Application and click on View details of your created application.

Copy your credentials: AppID and AppSecret (Generate it before).

On the ReachFive Console, go to Settings, Providers menu. Click on WeChat.

Paste your credentials and add needed permissions.

Click on Save.