Auth: Removal of conflicting users check upon creation (#89045)

fix: removal of check for conflicting users

pkg/services/user/userimpl/store.go

@@ -185,14 +185,14 @@ func (ss *sqlStore) GetByEmail(ctx context.Context, query *user.GetUserByEmailQu
 }
 
 // LoginConflict returns an error if the provided email or login are already
-// associated with a user. If caseInsensitive is true the search is not case
-// sensitive.
+// associated with a user.
 func (ss *sqlStore) LoginConflict(ctx context.Context, login, email string) error {
+	// enforcement of lowercase due to forcement of caseinsensitive login
+	login = strings.ToLower(login)
+	email = strings.ToLower(email)
+
 	err := ss.db.WithDbSession(ctx, func(sess *db.Session) error {
-		users := make([]user.User, 0)
 		where := "email=? OR login=?"
-		login = strings.ToLower(login)
-		email = strings.ToLower(email)
 
 		exists, err := sess.Where(where, email, login).Get(&user.User{})
 		if err != nil {
@@ -201,14 +201,7 @@ func (ss *sqlStore) LoginConflict(ctx context.Context, login, email string) erro
 		if exists {
 			return user.ErrUserAlreadyExists
 		}
-		if err := sess.Where("LOWER(email)=LOWER(?) OR LOWER(login)=LOWER(?)",
-			email, login).Find(&users); err != nil {
-			return err
-		}
 
-		if len(users) > 1 {
-			return &user.ErrCaseInsensitiveLoginConflict{Users: users}
-		}
 		return nil
 	})
 	return err