Hey @angus, we’re cleaning things up here.
Is it true that the OP code block should read:
SELECT id, username,
concat(
'$pbkdf2-sha256$i=64000,l=32$',
replace(encode(users.salt::bytea, 'base64'), '=', ''),
'$',
replace(encode(decode(password_hash, 'hex'), 'base64'), '=', '')
) as phc
FROM users
and include something like:
For more information about importing Discourse passwords to Auth0 see Bulk User Import Custom Password Hash Issue - Auth0 Community.
To move data from Auth0 to Discourse, this might help: Migrated password hashes support.