Fix update user auth. (#10013)

api4/user.go

@@ -856,6 +856,7 @@ func updateUserAuth(c *Context, w http.ResponseWriter, r *http.Request) {
 	user, err := c.App.UpdateUserAuth(c.Params.UserId, userAuth)
 	if err != nil {
 		c.Err = err
+		return
 	}
 
 	c.LogAuditWithUserId(c.Params.UserId, fmt.Sprintf("updated user auth to service=%v", user.AuthService))

api4/user_test.go

@@ -1203,7 +1203,7 @@ func TestUpdateUserAuth(t *testing.T) {
 	userAuth.AuthData = user.AuthData
 	userAuth.AuthService = ""
 	userAuth.Password = "1"
-	if _, err := th.Client.UpdateUserAuth(user.Id, userAuth); err == nil {
+	if _, err := Client.UpdateUserAuth(user.Id, userAuth); err == nil {
 		t.Fatal("Should have errored - user password not valid")
 	}