[keycloak-user] How can user change his password after login?

Hello, We are using Keycloak 3.4.3Final for authentication only and we want to create a link from the application so that user can change their password after login. I looked at the forget password flow and see the page http://localhost:8180/auth/realms/testRealm/login-actions/required-action... is what we need. Is there anyway to generate this link without the time constraint? Thank you Thai