fix(k8s/gitops): missing git auth toggle in k8s app edit page [EE-5320] (#8740)

api/http/handler/stacks/stack_update_git_redeploy.go

@@ -139,6 +139,9 @@ func (handler *Handler) stackGitRedeploy(w http.ResponseWriter, r *http.Request)
 	repositoryPassword := ""
 	if payload.RepositoryAuthentication {
 		repositoryPassword = payload.RepositoryPassword
+
+		// When the existing stack is using the custom username/password and the password is not updated,
+		// the stack should keep using the saved username/password
 		if repositoryPassword == "" && stack.GitConfig != nil && stack.GitConfig.Authentication != nil {
 			repositoryPassword = stack.GitConfig.Authentication.Password
 		}