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400: {"error":"invalid_grant","error_description":"Please check the 'sub' claim. The 'sub' specified

  • April 14, 2025
  • 1 reply
  • 3 views
A
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  • akashd
  • Community Manager
  • 1196 replies

Hi,

  • I am doing box integration with Salesforce. We are using JWT for authentication. While authentication we are getting invalid sub error. I am passing the enterpriseId in string format and also my app has permission for generating user token and perform action as user. What else could be reason for this error.

    1 reply

    A
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    • akashd
    • Author
    • Community Manager
    • 1196 replies
    • April 14, 2025

     

     

    When the sub is your enterprise ID, then the box_sub_type needs to be enterprise.

     

    sub: config.enterpriseID,
box_sub_type: "enterprise",

     

    Similarly when trying to create a JWT for a user the sub is your user ID and the box_sub_type should be user.

     

    Can you make sure that this is correct in your claim? You can see a full example over here.

     

    https://developer.box.com/guides/authentication/jwt/without-sdk/

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