php8 only; added variable types; short array syntax; remove glyphicons

public_html/deployment/classes/userauth.interface.php

 <?php
 /**
  * interface for user authentication
+ * 
  * @author axel.hahn@iml.unibe.ch
+ * 
+ * Axel <axel.hahn@unibe.ch>
+ * 2024-08-29  Axel php8 only; added variable types; use short array syntax
  */
-interface iUserAuth {
+interface iUserAuth
+{
 
     /**
-     * verify if a given user and password combination is correct
+     * Verify if a given user and password combination is correct
+     * 
+     * @param string  $sUser      username
+     * @param string  $sPassword  password
+     * @return boolean
      */
-    public function authenticate($sUser, $sPassword);
-    
+    public function authenticate(string $sUser, string $sPassword): bool;
+
 
 }
\ No newline at end of file