implemented saving auth token

main.go

@@ -7,6 +7,8 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"os"
+	"path/filepath"
 	"time"
 )
 
@@ -92,49 +94,61 @@ type McAuthRequest2 struct {
 }
 
 func main() {
-
-	resp, err := http.PostForm("https://login.microsoftonline.com/consumers/oauth2/v2.0/devicecode", url.Values{
-		"client_id": {client_id},
-		"scope":     {"XboxLive.SignIn XboxLive.offline_access"},
-	})
-	if err != nil {
-		fmt.Printf("Device Auth Step: %s\n", err)
-		return
-	} else {
-		defer resp.Body.Close()
-		if resp.StatusCode != 200 {
-			fmt.Printf("Device Auth Step: %v\n", resp.Status)
+	
+	auth := Authentication{}
+	dir, _ := os.UserConfigDir()
+	if _, err := os.Stat(filepath.Join(dir, "minecraft_test", "authentication.json")); err != nil {
+		resp, err := http.PostForm("https://login.microsoftonline.com/consumers/oauth2/v2.0/devicecode", url.Values{
+			"client_id": {client_id},
+			"scope":     {"XboxLive.SignIn XboxLive.offline_access"},
+		})
+		if err != nil {
+			fmt.Printf("Device Auth Step: %s\n", err)
 			return
 		}
-		data, _ := io.ReadAll(resp.Body)
-		codeResp := devCodeResp{}
-		json.Unmarshal(data, &codeResp)
-		fmt.Println(codeResp.Message)
-		ticker := time.NewTicker(time.Second * time.Duration(codeResp.Interval))
-		defer ticker.Stop()
-		auth := Authentication{}
-		for range ticker.C {
-			resp, err := http.PostForm("https://login.microsoftonline.com/consumers/oauth2/v2.0/token", url.Values{
-				"client_id":   {client_id},
-				"grant_type":  {"urn:ietf:params:oauth:grant-type:device_code"},
-				"device_code": {codeResp.Device_code},
-			})
-			if err != nil {
-				fmt.Printf("Authentication Request Error: %s\n", err)
-			}
 			defer resp.Body.Close()
-			//if resp.StatusCode != 200 {
-			//	fmt.Printf("Authentication Request Error: %s\n", resp.Status)
-			//}
-			data, _ := io.ReadAll(resp.Body)
-			authResp := authenticationResp{}
-			json.Unmarshal(data, &authResp)
-			if authResp.Error == "" {
-				fmt.Printf("Authenticated!\n")
-				auth.Access = authResp
-				break
+			if resp.StatusCode != 200 {
+				fmt.Printf("Device Auth Step: %v\n", resp.Status)
+				return
 			}
+			data, _ := io.ReadAll(resp.Body)
+			codeResp := devCodeResp{}
+			json.Unmarshal(data, &codeResp)
+			fmt.Println(codeResp.Message)
+			ticker := time.NewTicker(time.Second * time.Duration(codeResp.Interval))
+			defer ticker.Stop()
+			for range ticker.C {
+				resp, err := http.PostForm("https://login.microsoftonline.com/consumers/oauth2/v2.0/token", url.Values{
+					"client_id":   {client_id},
+					"grant_type":  {"urn:ietf:params:oauth:grant-type:device_code"},
+					"device_code": {codeResp.Device_code},
+				})
+				if err != nil {
+					fmt.Printf("Authentication Request Error: %s\n", err)
+				}
+				defer resp.Body.Close()
+				//if resp.StatusCode != 200 {
+				//	fmt.Printf("Authentication Request Error: %s\n", resp.Status)
+				//}
+				data, _ := io.ReadAll(resp.Body)
+				authResp := authenticationResp{}
+				json.Unmarshal(data, &authResp)
+				if authResp.Error == "" {
+					fmt.Printf("Authenticated!\n")
+					auth.Access = authResp
+					break
+				}
 
+			}
+			os.MkdirAll(filepath.Join(dir, "minecraft_test"), 0755)
+			f, _ := os.OpenFile(filepath.Join(dir, "minecraft_test", "authentication.json"), os.O_CREATE|os.O_RDWR, 0755)
+			defer f.Close()
+			data, _ = json.Marshal(auth.Access)
+			f.Write(data)
+		} else {
+			f, _ := os.OpenFile(filepath.Join(dir, "minecraft_test", "authentication.json"), os.O_CREATE|os.O_RDWR, 0755)
+			data, _ := io.ReadAll(f)
+			json.Unmarshal(data, &auth.Access)
 		}
 		req, _ := json.Marshal(xboxAuthRequest{Properties: xboxAuthProperties{AuthMethod: "RPS", SiteName: "user.auth.xboxlive.com", RpsTicket: "d=" + auth.Access.Access_token}, RelyingParty: "http://auth.xboxlive.com", TokenType: "JWT"})
 		client := http.Client{}
@@ -187,7 +201,7 @@ func main() {
 		httpReqMC, _ := http.NewRequest("POST", "https://api.minecraftservices.com/authentication/login_with_xbox", bytes.NewBuffer(mcAuthData))
 		httpReqMC.Header.Add("Content-Type", "application/json")
 		httpReqMC.Header.Add("Accept", "application/json")
-		resp, err = client.Do(httpReqMC)
+		resp, err := client.Do(httpReqMC)
 		if err != nil {
 			fmt.Printf("MC Auth Error: %s\n", err)
 		}
@@ -197,7 +211,6 @@ func main() {
 		}
 		d, _ = io.ReadAll(resp.Body)
 		fmt.Printf("MC Auth Response: %s\n", d)
-	}
 
 	/*
 		fmt.Println("Requesting Oauth")