1. Create a Salesforce Developer Account
To begin, you’ll need a Salesforce Developer account where you can create and manage your connected app.
- Go to the Salesforce Developer Signup Page
 - Fill out the registration form and verify your email.
 - Once your account is activated, log in to your Salesforce Developer account.
 
2. Create App
- Go to Settings > Home > App Manager.
 

- Click on New Connected App to create a new app.
External Client Apps -> Settings 

- Enter app details and save.
 

3. Get client credential.


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