Goto Postgres Conf file pg_hba.conf and add your Postgres user in the format of

host    <user name>   <ip/network>   md5

For Example, create a new Postgres user odoo and add it section after Linux/UNIX domain.

Follow these steps:

• Make a backup copy of the pg_hba.conf file before you alters it.
• If the PostgreSQL postmaster is already running, stop it using the pg_ctl stop command or windows defined way.  
• Open the pg_hba.conf file in a text editor. 

• Here my IP is a default and not configured any extra. So using localhost/127.0.0.1 and update

# "local" is for Unix domain socket connections only, Here accepts all users and ips with peer auth
local   all             all                                     peer
# Windows with new User odoo, all ips, with auth trust
host all             odoo                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5

you can change the auth method as md5/trust with a new user. The authentication method varies according to your needs. I can share with you the basic PSQL Windows deployment DOC.

WIndows Postgres Deployment

TO know more about the Postgres configuration file, please refer here

https://www.postgresql.org/docs/9.3/auth-pg-hba-conf.html

https://desktop.arcgis.com/en/arcmap/10.3/manage-data/gdbs-in-postgresql/configure-postgresql-accept-connections.htm