Uses SHA-256 as hash function. The iteration count is limited to 100000. The mechanism name is "SCRAM-SHA-256".
val hash_function :
The hash function. We only allow functions where IANA registered an official name. Note that SCRAM is currently only specified for SHA1, although the hash function is easily exchangable.
val iteration_count_limit :
The maximum iteration count supported
val announce_channel_binding :
Whether servers announce the availability of channel binding by adding "-PLUS" to the mechanism name.