After migration, new imac won’t accept login password

I just migrated to a new imac from a time machine backup. Migration finished, but new machine wont accept my login password (even though the old hint is still there).

I tried all likely mistypings, without success - because the migration assistant had required me to create a new admin password and I simply used the same user acct password (from the old imac) to do so. I’m not being offered any option to log in with my apple id either.

Thanks!