[fix] key length

- uuid is too long for encryption key

README.md

@@ -4,7 +4,7 @@ mctl is a terminal-friendly remote connection client
 ## Installation
 Install mctl using golang
 ```bash
-go install code.jakeyoungdev.com/jake/mctl@master #it is recommended to use a tagged version to prevent pulling unwanted changes
+go install code.jakeyoungdev.com/jake/mctl@main #it is recommended to use a tagged version to prevent pulling unwanted changes
 ```
 
 ## Setup

cmd/config.go

@@ -11,7 +11,6 @@ import (
 	"io"
 	"os"
 
-	"github.com/google/uuid"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"golang.org/x/term"
@@ -87,9 +86,11 @@ func initConfig() {
 		viper.Set("nonce", "")
 
 		//generate a uuid to be used as encryption key
-		uu := uuid.New()
-		viper.Set("device", uu.String())
+		uu := make([]byte, 32)
+		_, err := rand.Read(uu)
+		cobra.CheckErr(err)
 
+		viper.Set("device", string(uu))
 		viper.SafeWriteConfig()
 	}
 }