I am not exactly sure what programming language your example code is in so here an example if you use PHP and raw SQL commands (without going through EZ)
I'm using perl..the sql statement concatenates login and password, but I get the wrong hash_value for password_hash. Guess I've tried almost everything:
concatenate just password in plaintext, concat login+password in plaintext, concat login,password in plaintext + site + hash_type, but I know the md5_user function I shall use, only concatenate login and password in plaintext, but I don't know why the hash is not correct :(