Turns out, our client needs to have Client authentication enabled:

then you will have a new tab credentials where you will see the client secret.

In order to override the text of the password reset emails in Keycloak, you want to do the following.

Make your own copy of the default themes. These can currently be found at: https://github.com/Halazv2/keycloak-theme/tree/master/themes/base/email 

Then, make changes to the theme as appropriate. There are several themes: the login theme stores the styling of the login pages. But the email theme contains the wording of the emails. 

First, I recommend setting up a backup. This way, exporting and importing users is done via backup. You would not need to recreate the realm: you can do a partial import of users into an existing realm.

My keycloak is setup with backups via docker: