How to insert multiple rows by one query? [duplicate] - postgresql

Question

This question already has answers here:
How do I insert multiple values into a postgres table at once?
(6 answers)
How to insert multiple data at once
(8 answers)
Closed 3 years ago.
In PostgreSQL I have a pretty simple table where I store information about relationships between users and games. Here is a working function which I use to insert data. As you can see it makes multiple SQL queries to the database which is not elegant I think. What do I need to change to insert multiple rows with one query?
var CreateRelationship = func(responseWriter http.ResponseWriter, request *http.Request) {
userID := mux.Vars(request)["user_id"]
type RequestBody struct {
Games []int `json:"games"`
}
requestBody := RequestBody{}
decoder := json.NewDecoder(request.Body)
if err := decoder.Decode(&requestBody); err != nil {
utils.ResponseWithError(responseWriter, http.StatusBadRequest, err.Error())
return
}
for i := 0; i < len(requestBody.Games); i++ {
if _, err := database.DBSQL.Exec("INSERT INTO users_games_relationship (user_id, game_id) VALUES ($1, $2);", userID, requestBody.Games[i]); err != nil {
utils.ResponseWithError(responseWriter, http.StatusInternalServerError, err.Error())
return
}
}
utils.ResponseWithSuccess(responseWriter, http.StatusOK, "All new records successfully created.")
}