fix: if user is already verified, abort

account/account.go

@@ -134,6 +134,10 @@ func (s AccountServiceDefault) SendEmailVerification(userId uint) error {
 		return err
 	}
 
+	if user.Verified {
+		return NewAccountError(ErrKeyAccountAlreadyVerified, nil)
+	}
+
 	token := GenerateSecurityToken()
 
 	var verification models.EmailVerification

account/errors.go

@@ -25,7 +25,8 @@ const (
 	ErrKeyHashingFailed         = "ErrHashingFailed"
 
 	// Account update errors
-	ErrKeyAccountUpdateFailed = "ErrAccountUpdateFailed"
+	ErrKeyAccountUpdateFailed    = "ErrAccountUpdateFailed"
+	ErrKeyAccountAlreadyVerified = "ErrAccountAlreadyVerified"
 
 	// JWT generation errors
 	ErrKeyJWTGenerationFailed = "ErrJWTGenerationFailed"
@@ -72,7 +73,8 @@ var defaultErrorMessages = map[string]string{
 	ErrKeyLoginFailed:           "Login failed due to an internal error.",
 
 	// Account update errors
-	ErrKeyAccountUpdateFailed: "Failed to update account information.",
+	ErrKeyAccountUpdateFailed:    "Failed to update account information.",
+	ErrKeyAccountAlreadyVerified: "Account is already verified.",
 
 	// JWT generation errors
 	ErrKeyJWTGenerationFailed: "Failed to generate a new JWT token.",
@@ -118,7 +120,8 @@ var (
 		ErrKeyLoginFailed:           http.StatusInternalServerError,
 
 		// Account update errors
-		ErrKeyAccountUpdateFailed: http.StatusInternalServerError,
+		ErrKeyAccountUpdateFailed:    http.StatusInternalServerError,
+		ErrKeyAccountAlreadyVerified: http.StatusConflict,
 
 		// JWT generation errors
 		ErrKeyJWTGenerationFailed: http.StatusInternalServerError,