sudo -i -u postgres psql

CREATE ROLE agent1 WITH LOGIN PASSWORD 'agent1' VALID UNTIL '2205-01-01'

/etc/postgresql/12/main/postgresql.conf

listen_addresses = '*'

/etc/postgresql/12/main/pg_hba.conf
host    all             all             10.1.1.x/32            md5

sudo systemctl restart postgresql

from 10.1.1.x/32

psql -h unode-server -U agent1 -d unode

sudo -i -u postgres psql unode

GRANT SELECT ON agents to agent1;
GRANT INSERT ON agents to agent1;
GRANT USAGE, SELECT ON SEQUENCE agents_id_seq TO agent1;

insert into agents (id, alias) VALUES (DEFAULT, 'jtest');
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO www;
(uuid_generate_v4()

Ref

Unode