Error Connecting to database FATAL : no pg_hba.conf entry for host code example

Example 1: django.db.utils.operationalerror: fatal: no pg_hba.conf entry for host

You obviously do not have connection profile for user "user1" against 
database "ttio" on the machine. The only remote access that your 
pg_hba.conf currently specifies is for any user to the database with 
the same name as the user from address 127.0.0.200.

You need an entry like:

host ttio user1 <ip_address> <netmask>


The <ip_address> <netmask> combination is specific to your network 
configuration and refers to the IP address of the client.

Example 2: unhandledpromiserejectionwarning: error: no pg_hba.conf entry for host

var client = new pg.Client({
    user: "admin",
    password: "guest",
    database: "Employees",
    port: 5432,
    host: "localhost",
    ssl: true
}); 
client.connect();