You will be brought to a Application Management Page. Scroll down to find are you a developer? create an app... button.
You will be shown a form where you have to enter Application Details and redirect URL. Fill the form with appropriate information. Enter the Redirect URI from MO OAuth Plugin and then click on create app
You will be brought back to Application Details page. Here you can find Client ID andSecret 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