Add support for matrix-synapse-shared-secret-auth

docs/configuring-playbook-rest-auth.md

@@ -1,6 +1,6 @@
 # Setting up the REST authentication password provider module
 
-The playbook can now install and configure [matrix-synapse-rest-auth](https://github.com/kamax-io/matrix-synapse-rest-auth) for you.
+The playbook can install and configure [matrix-synapse-rest-auth](https://github.com/kamax-io/matrix-synapse-rest-auth) for you.
 
 See that project's documentation to learn what it does and why it might be useful to you.
 

docs/configuring-playbook-shared-secret-auth.md

@@ -0,0 +1,12 @@
+# Setting up the Shared Secret Auth password provider module
+
+The playbook can install and configure [matrix-synapse-shared-secret-auth](https://github.com/devture/matrix-synapse-shared-secret-auth) for you.
+
+See that project's documentation to learn what it does and why it might be useful to you.
+
+If you decide that you'd like to let this playbook install it for you, you need some configuration like this:
+
+```yaml
+matrix_synapse_ext_password_provider_shared_secret_auth_enabled: true
+matrix_synapse_ext_password_provider_shared_secret_auth_shared_secret: YOUR_SHARED_SECRET_GOES_HERE
+```

docs/configuring-playbook.md

@@ -33,4 +33,6 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Using your own webserver, instead of this playbook's nginx proxy](configuring-playbook-own-webserver.md) (optional)
 
-- [Setting up the REST authentication password provider module](configuring-playbook-rest-auth.md) (optional)
+- [Setting up the REST authentication password provider module](configuring-playbook-rest-auth.md) (optional)
+
+- [Setting up the Shared Secret Auth password provider module](configuring-playbook-shared-secret-auth.md) (optional)