How to set headers in HTTP GET request in Go?

Hello everyone! I'm new to Go and trying to make an HTTP GET request to an external API. I need to pass several headers, such as `Authorization` and `Content-Type`. I read the documentation but can't figure out how to do it correctly. Here's my current code that doesn't work: ```go package main import ( "fmt" "io/ioutil" "net/http" ) func main() { url := "https://api.example.com/data" // Trying to set headers req, err := http.NewRequest("GET", url, nil) if err != nil { panic(err) } req.Header.Set("Authorization", "Bearer my-token") req.Header.Set("Content-Type", "application/json") // Executing the request resp, err := http.Get(url) // This is the problem! if err != nil { ```