Security tokens are used by Salesforce for an additional layer of authentication.
Complete the following steps to reset the security token for the integration user:
- Login to Salesforce.
- Click on your name in the top right corner and then click Setup.
- On the left side of the page, click My Personal Information and then click Reset My Security Token.
- On the next page, click Reset Security Token.
Note: Apply the new security token to any third-party integration that is sharing the username.