Docs - Add missing steps to Basic authentication how-to

docs/src/main/asciidoc/security-basic-authentication-howto.adoc

@@ -15,23 +15,37 @@ Enable xref:security-basic-authentication.adoc[Basic authentication] for your Qu
 
 == Prerequisites
 
-* You have installed at least one extension that provides an `IdentityProvider` based on username and password, such as xref:security-jdbc.adoc[Elytron JDBC].
+* You have installed at least one extension that provides an `IdentityProvider` based on username and password.
+For example:
+
+* xref:security-properties[Elytron security properties file extension `(quarkus-elytron-security-properties-file)`]
+* xref:security-jdbc.adoc[Elytron security JDBC extension `(quarkus-elytron-security-jdbc)`]
+
+The following procedure outlines how you can enable Basic authentication for your application by using the `elytron-security-properties-file` extension.
 
 == Procedure
 
-. Enable Basic authentication by setting the `quarkus.http.auth.basic` property to `true`.
+. In the `application.properties` file, set the `quarkus.http.auth.basic` property to `true`.
 +
 [source,properties]
 ----
 quarkus.http.auth.basic=true
 ----
 
-. For testing purposes, you can configure the required user credentials, user name, secret, and roles, in the `application.properties` file.
+. To enable authentication for the embedded realm, set the `quarkus.security.users.embedded.enabled` property to `true`.
++
+[source,properties]
+----
+security.users.embedded.enabled=true
+----
+
+. For testing purposes, you can also configure the required user credentials, user name, secret, and roles.
 For example:
 +
 [source,properties]
 ----
 quarkus.http.auth.basic=true
+quarkus.security.users.embedded.enabled=true
 quarkus.security.users.embedded.plain-text=true
 quarkus.security.users.embedded.users.alice=alice <1>
 quarkus.security.users.embedded.users.bob=bob <2>