Fix new user create 500 error

Signed-off-by: Asai Neko <sugar@sne.moe>

service/service_auth/redirect.go

@@ -56,6 +56,7 @@ func (self *AuthServiceImpl) Redirect(payload *RedirectPayload) (result *Redirec
 		GetByEmail(payload.Context, &authCode.Email)
 	if err != nil {
 		if err == gorm.ErrRecordNotFound {
+			userData = &data.User{}
 			userData.UUID = uuid.New()
 			userData.UserId = uuid.New()
 			userData.Email = authCode.Email