Creating a user with SCRAM-based authentication

As mentioned in the previous subsection, SCRAM is the default authentication mechanism. The only thing you need to do is to identify the type of hash when creating a database user. When defining a new database user, add a mechanisms key, and set the value to either SCRAM-SHA-1 or SCRAM-SHA-256. The SHA-1 hashing algorithm is no longer considered secure; however, you may need this option for backwards compatibility with older hashed passwords. The SHA-256 algorithm is recommended. 

If using SCRAM-SHA-1, you can also set a value of scramIterationCount, which has a minimum value of 5000 and a default value of 10000. The higher the value, the more secure is the hash. The higher the value, the longer it takes to calculate, so you'll need to arrive at a good balance between security and performance. The default is recommended. 

Likewise, if using SCRAM-SHA-256, you can set a value of scramSHA256IterationCount, which...