~ ❯❯❯ psql
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psql (10.1)
Type "help" for help.

postgres=# set password_encryption = 'scram-sha-256' ;
SET
Time: 0.219 ms
postgres=# show password_encryption
;
┌─────────────────────┐
│ password_encryption │
├─────────────────────┤
│ scram-sha-256       │
└─────────────────────┘
(1 row)

Time: 0.486 ms
postgres=#