To connect to your RDS for PostgreSQL DB instance using pgAdmin
1. Launch the pgAdmin application on your client computer.
2. On the Dashboard tab, choose Add New Server.
3. In the Create - Server dialog box, type a name on the General tab to identify the server in pgAdmin.
4. On the Connection tab, type the following information from your DB instance:
5. For Host, type the endpoint, for example mypostgresql.c6c8dntfzzhgv0.us-east-2.rds.amazonaws.com.
6. For Port, type the assigned port.
7. For Username, type the user name that you entered when you created the DB instance (if you changed the 'master username' from the default, postgres).
8. For Password, type the password that you entered when you created the DB instance.