SQLSTATE[08006] [7] could not connect to server::Why isn’t this working?”

i'm trying to run my laravel project on postgresql,But i getting the following error to conect to the database:: SQLSTATE[08006] [7] could not connect to server: Connection refused Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?

via Chebli Mohamed