improve onboarding documentation

The onboarding documentation has been missing instructions on where to find the ML password, as well as instructions to set the group membership in the archlinux.org interface. This commit adds these missing informations.

implements #226 (closed)

.gitlab/issue_templates/Onboarding.md

@@ -12,6 +12,7 @@ It can also be used as a reference for adding new roles to an existing team memb
   - **Voting result**: <!-- Add link to relevant mailing list mail -->
 
 ## All roles checklist
+The mailing list password can be found in misc/additional-credentials.vault.
 
 - [ ] Add new user email as per `docs/email.md`.
 - [ ] Create a new user in archweb: https://www.archlinux.org/devel/newuser/
@@ -25,6 +26,7 @@ It can also be used as a reference for adding new roles to an existing team memb
 - [ ] Add SSH pubkey to `pubkeys/<username>.pub`.
 - [ ] Run `ansible-playbook -t archusers playbooks/*.yml`.
 - [ ] Assign the user to the `Developers` groups on Keycloak.
+- [ ] Assign the user to the `Developers` group on [archlinux.org](https://archlinux.org/admin/auth/user/)
 - [ ] Subscribe user to internal [arch-dev mailing list](https://lists.archlinux.org/admin/arch-dev/members/add)
 - [ ] Whitelist email address on [arch-dev-public](https://lists.archlinux.org/admin/arch-dev-public/members) (find member and unmoderate)
 
@@ -34,6 +36,7 @@ It can also be used as a reference for adding new roles to an existing team memb
 - [ ] Add SSH pubkey to `pubkeys/<username>.pub`.
 - [ ] Run `ansible-playbook -t archusers playbooks/*.yml`.
 - [ ] Assign the user to the `Trusted Users` groups on Keycloak.
+- [ ] Assign the user to the `Trusted Users` group on [archlinux.org](https://archlinux.org/admin/auth/user/)
 - [ ] Whitelist email address on [arch-dev-public](https://lists.archlinux.org/admin/arch-dev-public/members) (find member and unmoderate)
 - [ ] Subscribe user to internal [arch-tu mailing list](https://lists.archlinux.org/admin/arch-tu/members/add)