Our team is answering some frequently asked questions.
I would recommend using the Auth0.js library (Auth0.js v9 Reference). Here is an example to illustrate a possible solution when using a custom domain for a customized UL login page:
var webAuth = new auth0.WebAuth({
clientID: config.clientID,
domain: config.auth0Domain,
...
overrides: {
__tenant: config.auth0Tenant,
__token_issuer: config.authorizationServer.issuer
},
...
});