Be a bit more verbose regarding actions

Signed-off-by: Shin'ya Minazuki <shinyoukai@laidback.moe>

login.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"os"
 	"strings"
 	"syscall"
 
@@ -62,9 +63,20 @@ func signin(cli *client.Client) {
 
 	token := strings.Trim(fmt.Sprintf(res.Token), "{}")
 
-	fmt.Println("Login successful")
-	fmt.Println("Place this token in your configuration file for later use")
-	fmt.Println("Do not share it with anyone, it's classified information!")
-	fmt.Println("")
-	fmt.Printf("token = %v\n", token)
+	config, err := os.UserConfigDir()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	configPath := config + "/mikuru.ini"
+
+	f, err := os.OpenFile(configPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+
+	f.WriteString("token = " + token + "\n")
+
+	log.Info("Login successful")
 }