Understand how to generate an access token for Salesforce using Postman.

Step-by-Step Guide:

Go to Salesforce Setup:

• In the Quick Find box, search for OpenID.
• Under OpenID, enable the Allow OAuth Username-Password Flows option for your users.

Create a New Connected App:

• Go to App Manager and click New Connected App.
• Set the Callback URL to https://login.salesforce.com.
• Under OAuth Scopes, select Full Access and Offline Access.
• Save the Connected App.

Access Consumer Details:

• Once the Connected app is saved, navigate to the Consumer Details section and copy the Client ID and Client Secret.

Reset Security Token:

• Go to your Profile Settings and find the Reset My Security Token option.
• Reset the token, which will be sent to your registered email address.

Open Postman and Create a New Request:

• In Postman, create a New Request.
• Set the request type to POST.
• Use the following endpoint URL for the request:
• https://test.salesforce.com/services/oauth2/token?grant_type=password&client_id={clientId}&client_secret={clientSecret}&username={UserName}&password={Password}{SecurityToken}
• Replace {clientId}, {clientSecret}, {UserName}, {Password}, and {SecurityToken} with the actual values from Salesforce.
• Set the Authorization type to Inherit from Parent in Postman
• After entering all the details, click Send to authenticate and obtain the access token.

Then It will give you an Access Token along with the instance_url

Here is an example:

For detailed and step by step Video: https://www.youtube.com/watch?v=4lImNgIKDRw