rsponse 404 when delete not exist email (#15383)

fix #15357

Signed-off-by: a1012112796 <1012112796@qq.com>

models/error.go

@@ -222,6 +222,21 @@ func (err ErrEmailInvalid) Error() string {
 	return fmt.Sprintf("e-mail invalid [email: %s]", err.Email)
 }
 
+// ErrEmailAddressNotExist email address not exist
+type ErrEmailAddressNotExist struct {
+	Email string
+}
+
+// IsErrEmailAddressNotExist checks if an error is an ErrEmailAddressNotExist
+func IsErrEmailAddressNotExist(err error) bool {
+	_, ok := err.(ErrEmailAddressNotExist)
+	return ok
+}
+
+func (err ErrEmailAddressNotExist) Error() string {
+	return fmt.Sprintf("Email address does not exist [email: %s]", err.Email)
+}
+
 // ErrOpenIDAlreadyUsed represents a "OpenIDAlreadyUsed" kind of error.
 type ErrOpenIDAlreadyUsed struct {
 	OpenID string

models/user_mail.go

@@ -6,7 +6,6 @@
 package models
 
 import (
-	"errors"
 	"fmt"
 	"net/mail"
 	"strings"
@@ -18,9 +17,6 @@ import (
 	"xorm.io/builder"
 )
 
-// ErrEmailAddressNotExist email address not exist
-var ErrEmailAddressNotExist = errors.New("Email address does not exist")
-
 // EmailAddress is the list of all email addresses of a user. Can contain the
 // primary email address, but is not obligatory.
 type EmailAddress struct {
@@ -243,7 +239,7 @@ func DeleteEmailAddress(email *EmailAddress) (err error) {
 	if err != nil {
 		return err
 	} else if deleted != 1 {
-		return ErrEmailAddressNotExist
+		return ErrEmailAddressNotExist{Email: email.Email}
 	}
 	return nil
 }