added comments

backend/internal/auth/resource.go

@@ -11,6 +11,7 @@ import (
 	"gorm.io/gorm/clause"
 )
 
+// Config defines a struct for configuration settings, often loaded from environment variables.
 type Config struct {
 	Secret        string        `env:"SECRET"`
 	ValidDuration time.Duration `env:"VALID_DURATION"`
@@ -19,11 +20,13 @@ type Config struct {
 	DefaultRole   model.Role    `env:"DEFAULT_ROLE"`
 }
 
+// Service Represents a service with configuration and database connection.
 type Service struct {
 	cfg *Config
 	db  *gorm.DB
 }
 
+// New creates a new Service instance, initializing a default admin user and saving it to the database.
 func New(cfg *Config, db *gorm.DB) *Service {
 	user := model.NewUser()
 	var err error
@@ -42,16 +45,20 @@ func New(cfg *Config, db *gorm.DB) *Service {
 	}
 }
 
+// Claims struct represents JWT claims, including role and user ID, extending the standard jwt.RegisteredClaims.
 type Claims struct {
 	Role   model.Role `json:"rl"`
 	UserID uint       `json:"uid"`
 	jwt.RegisteredClaims
 }
+
+// Login struct represents user login credentials with a name and password.
 type Login struct {
 	Name     string `json:"name"`
 	Password string `json:"Password"`
 }
 
+// LoginResponse Represents the response from a login endpoint, containing a JWT token.
 type LoginResponse struct {
 	Token string `json:"token"`
 }