# Unsupported password hash algorithm during bulk user import job

**URL:** <https://community.auth0.com/t/unsupported-password-hash-algorithm-during-bulk-user-import-job/73891>\
**Category:** Get Help\
**Created:** [November 29, 2021, 1:42am UTC](https://community.auth0.com/t/unsupported-password-hash-algorithm-during-bulk-user-import-job/73891 "2021-11-29T01:42:58Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![derwald](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/derwald/32/42568_2.png) [@derwald](https://community.auth0.com/u/derwald)\
**Post date:** [January 18, 2023, 3:24pm UTC](https://community.auth0.com/t/unsupported-password-hash-algorithm-during-bulk-user-import-job/73891/7 "2023-01-18T15:24:41Z")

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@dan.woda I tried to willingly create an invalid hash for the examples listed here [Bulk User Import Database Schema and Examples](https://auth0.com/docs/manage-users/user-migration/bulk-user-import-database-schema-and-examples). For some algorithms, like bcrypt, an incorrect hash will not even import the new user; and for some others, like md4, I couldn’t create an incorrect hash.

Do you happen to know which incorrect hash (if possible please with an example, including which algorithm and which hash value), will:

1. Import the user
2. When that users tries to login, will see a screenshot like in [Error after importing user with custom password hash](https://community.auth0.com/t/error-after-importing-user-with-custom-password-hash/84260)

Thank you so much for your help!

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