add cache for groups and clients, http sending message remains to be add

tokens.go

@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/golang-jwt/jwt/v5"
-	_ "github.com/golang-jwt/jwt/v5"
 )
 
 var secretKey = []byte("replace-with-env-variable")
@@ -22,7 +21,7 @@ func GetToken(user *User) (string, error) {
 	token := jwt.NewWithClaims(jwt.SigningMethodHS256,
 		UserClaims{
 			Name:  user.Name,
-			Color: user.Color,
+			Color: string(user.Color[:]),
 			RegisteredClaims: jwt.RegisteredClaims{
 				Subject:   strconv.Itoa(int(user.Id)),
 				ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
@@ -54,9 +53,11 @@ func GetUserFromToken(tokenString string) (User, error) {
 		return User{}, fmt.Errorf("invalid subject: %w", err)
 	}
 
+	var color [3]byte
+	copy(color[:], claims.Color)
 	return User{
 		Id:    uint32(id),
 		Name:  claims.Name,
-		Color: claims.Color,
+		Color: color,
 	}, nil
 }