DB Link creation with direct insert

insert into sys.link$ (OWNER#, NAME, CTIME, HOST, USERID, PASSWORD, FLAG, AUTHUSR, AUTHPWD, PASSWORDX, AUTHPWDX)
SELECT user_id 
 ,'DB_LINK_NAME'
 ,SYSDATE 
 ,'CONNECTION_STRING',
 'TARGET_DATABASE_USERNAME',
 null, '2', null, NULL
 ,'hashed password can be extracted from sys.link$.PASSWORDX'
 , NULL
FROM dba_users
WHERE username = 'LINK_OWNER' -- DB link owner