anager, [
            {main_backend, [
                {backend, postgres_backend},
                {server, "localhost"},
                {username, "postgres"},
                {password, "server"},
                {database, "my_app_db"},
                %% max amount of database connections in the
                %% connection pool.
                {max_reusable_connections, 10}, % 10 connections.
                %% max time to wait for an available connection.
                {wait_for_reusable_connect