USER_MISMATCH

The specified user Id is incompatible with the value stored on disk.

To prevent data corruption, Instant verifies that you do not inadvertently “switch out” the user for a document descriptor. If the JWT you used to download a layer contained the `user_id` claim, that value is stored on disk. Whenever you attempt to re-authenticate the document descriptor, Instant then compares the stored value to the value encoded in the new JWT, and will fail with this error if the values do not match up.