Use ID or Where to instead directly use Get when load object from database (#11925) (#11935)

Backport #11925

Use ID or Where to instead directly use Get when load object from database

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/user.go

@@ -1457,8 +1457,8 @@ func GetUserByEmail(email string) (*User, error) {
 	// Finally, if email address is the protected email address:
 	if strings.HasSuffix(email, fmt.Sprintf("@%s", setting.Service.NoReplyAddress)) {
 		username := strings.TrimSuffix(email, fmt.Sprintf("@%s", setting.Service.NoReplyAddress))
-		user := &User{LowerName: username}
-		has, err := x.Get(user)
+		user := &User{}
+		has, err := x.Where("lower_name=?", username).Get(user)
 		if err != nil {
 			return nil, err
 		}