Most people use passwords to connect to the database and manage security. Traditionally, people utilized md5. However, md5 is not safe anymore and therefore new authentication methods are needed. Starting with version 10.0, PostgreSQL supports SCRAM-SHA-256, which is far safer than the previous authentication method.
The old way of doing it is still supported. However, it is strongly recommended to move to SCRAM-SHA-256 in favor of md5.
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