Ensure internal authentication users are properly configured

roles/matrix-jitsi/tasks/validate_config.yml

@@ -3,14 +3,14 @@
 - name: Fail if required Jitsi settings not defined
   fail:
     msg: >-
-      You need to define a required configuration setting (`{{ item }}`) for using Jitsi.
+      You need to define a required configuration setting (`{{ item }}`) to properly configure Jitsi.
 
       If you're setting up Jitsi for the first time, you may have missed a step.
       Refer to our setup instructions (docs/configuring-playbook-jitsi.md).
 
-      If you had setup Jitsi successfully before and it's just now that you're observing this failure,
-      it means that your installation may be using some default passwords that the playbook used to define until now.
-      This is not secure and we urge you to rebuild your Jitsi setup.
+      If you had previously setup Jitsi successfully and are only now facing this error,
+      it means that your installation is most likely using default passwords previously defined by the playbook.
+      These defaults are insecure. Jitsi should be rebuilt with secure values.
       Refer to the "Rebuilding your Jitsi installation" section in our setup instructions (docs/configuring-playbook-jitsi.md).
   when: "vars[item] == ''"
   with_items:
@@ -19,6 +19,28 @@
     - "matrix_jitsi_jicofo_auth_password"
     - "matrix_jitsi_jvb_auth_password"
 
+
+- name: Fail if Jitsi internal authentication settings not defined
+  fail:
+    msg: >-
+      You must define the (`{{ item.username }}`) and (`{{ item.password }}`) configuration settings to properly configure an account using Jitsi's internal authentication.
+
+      Please ensure you have defined at least one user and password when using internal authentication.
+      
+      If you're setting up Jitsi for the first time, you may have missed a step.
+      Refer to our setup instructions (docs/configuring-playbook-jitsi.md).
+
+      If you had previously setup Jitsi successfully and are only now facing this error,
+      it means that your installation is most likely using default passwords previously defined by the playbook.
+      These defaults are insecure. Jitsi should be rebuilt with secure values.
+      Refer to the "Rebuilding your Jitsi installation" section in our setup instructions (docs/configuring-playbook-jitsi.md).
+  when: 
+    - matrix_jitsi_auth_type == "internal"
+    - item.username == ''
+    - item.password == ''
+  with_items: "{{ matrix_jitsi_prosody_auth_internal_accounts }}"
+
+
 - name: (Deprecation) Catch and report renamed settings
   fail:
     msg: >-