how to encrypt data in postgresql code example

Example: encrypt data in postgresql

CREATE TABLE testusers(username varchar(100) PRIMARY KEY, cryptpwd text, md5pwd text);
INSERT INTO testusers(username, cryptpwd, md5pwd) 
    VALUES ('robby', crypt('test', gen_salt('md5')), md5('test')),
        ('artoo', crypt('test',gen_salt('md5')), md5('test'));
        
SELECT username, cryptpwd, md5pwd
    FROM testusers;
    
 username |              cryptpwd              |              md5pwd

----------+------------------------------------+---------------------------------
 robby   | $1$IOchfG/z$bZW1pRFA3wuvn6pAuD.Du/ | 098f6bcd4621d373cade4e832627b4f6
 artoo   | $1$84oZTXI/$yZ6wV5jhJo6aQYrTciMQR/ | 098f6bcd4621d373cade4e832627b4f6