can't connect to postgresql database "database doesn´t exist" - database

Question

I have a Go app that connects with a postgres database through the driver called "github.com/lib/pq".
I make a connection with a database called godb, and the function Open() works correctly, but when I check errors with db.Ping(), it tells me the database doesn´t exist, although I have created it in pg Admin and the name and the password are well written. I have tried to check if the connection string is correct, I have tried to create a new database and connect it but it gives the same error. I have also tried to disconnect and reconnect the database and it doesn't work.
package main
import (
"database/sql"
"fmt"
"log"
"sync"
//driver of the database
_ "github.com/lib/pq"
)
var (
db *sql.DB
once sync.Once
)
func NewPostgresDB() {
once.Do(func() {
var err error
db, err = sql.Open("postgres",
"postgres://postgres:/*password of the database*/#localhost:5432/godb?sslmode=disable")
if err != nil {
log.Fatalf("There is an error in the connction string %v", err)
}
if err = db.Ping(); err != nil {
log.Fatalf("There was an error connecting to the database %v", err)
}
})
fmt.Println("connection succeeded")
}
this is the error it exactly returns (it's in Spanish):
pq: no existe la base de datos �godb�
exit status 1