Postres db Error : connection failed: FATAL: password authentication failed for user -AWS Aurora Postgres/RDS

Postgres Connection error : pgAdmin

connection failed: FATAL: password authentication failed for user "amd" connection to server at "dev-app-instance-1.gbhfthy.us-east-1.rds.amazonaws.com" (10.8767.11.10), port 5432 failed: FATAL: password authentication failed for user "amd"

Solution: 

create database abcd;

create user amd password 'amd';

grant connect on database abcd to rds_superuser;

grant  rds_superuser to amd;