Create user mapping without password how to configure authentication

I am trying to create a user mapping in PostgreSQL without a password, but I am encountering an error that says. local_db=> select * from employee; ERROR: could not connect to server "testmachine02" DETAIL: connection to server at "192.168.56.10", port 5432 failed: fe_sendauth: no password supplied Here is the command that I used to create the user mapping: CREATE USER MAPPING for app_user SERVER testmachine02 OPTIONS (password_required 'false'); I also created a pgpass file under /root/.pgpass with the following entries: localhost:5432:local_db:app_user:app_user123 192.168.56.10:5432:admin:admin:admin123 192.168.56.10:5432:remote_db:test:test123 Despite these steps, I am still unable to access the table without a password. How can I create a user mapping without a password and access the table?