If you want to change postgres user password, follow bellow instruction.
First open terminal, then run bellow commend to access postgres terminal.
root@borbibi:/home/borbibi/borbibi# sudo -u postgres psql postgres
psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
Type "help" for help.
Now run bellow commend to change expected user password.
postgres=# ALTER USER postgres PASSWORD '12365410';
ALTER ROLE
postgres=#
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