```{r, echo=FALSE, message=FALSE}
sql = "SELECT 1;"
connPostgres = dbConnect(
  dbDriver("PostgreSQL"), dbname="universe",
  host="localhost", port=5432,
  user="lee", password="***"
)
df = dbGetQuery(connPostgres, sql)
```

Error in file(con, "r") : cannot open the connection
Calls: <Anonymous> ... withVisible -> eval -> eval -> paste -> readLines -> file
Execution halted