You will be shown a form where you have to enter Application Details and OAuth Domain. Fill the form with appropriate information. Enter the Application Website from your plugin and then click on Register Your Application
You will be brought back to the Application Details page. Here you can find Client ID and Secret as shown below.
Step 2: Set credentials in miniOrange Social Login Plugin
Copy the Client Id and Client Secret form above setup and Paste them into the fields in Instructions.
Then click on Save & Test Configuration button.
Custom app will set properly when Test configuration get successful