Verification Code: 

You can require members to provide a verification code at registration. You can either configure it to be sent by SMS or email , depending on the unique identifier of the business. 

In order to see the code that was sent to the member, enter the Hub > Go to the top-right wrench icon > Get Verification Code > Enter email or phone number > Get Verification Code.

See pictures bellow:

App Client ID: 

To generate an app client ID within the HUB you need to click on the toolbar icon and then click on it to get the verification code.
 

The code can be generated via phone number or email and is a configuration in HUB 1 under Settings >>  App Login Validation Type (Existing Members) in HUB 1.