Fix hasMissingTokens & update interface

src/classes/NostoAccount.php

@@ -231,14 +231,14 @@ public function isConnectedToNosto()
     public function hasMissingTokens()
     {
         if (empty($this->tokens)) {
-            return false;
+            return true;
         }
         foreach (NostoApiToken::getApiTokenNames() as $name) {
             if ($this->getApiToken($name) === null) {
-                return false;
+                return true;
             }
         }
-        return true;
+        return false;
     }
 
     /**

src/interfaces/account/NostoAccountInterface.php

@@ -74,12 +74,20 @@ public function delete();
     public function getName();
 
     /**
-     * Checks if this account has been connected to Nosto, i.e. all API tokens exist.
+     * Checks if this account has been connected to Nosto,
+     * i.e. all mandatory API tokens exist.
      *
      * @return bool true if it is connected, false otherwise.
      */
     public function isConnectedToNosto();
 
+    /**
+     * Checks if this account has all API tokens
+     *
+     * @return bool true if some token(s) are missing, false otherwise.
+     */
+    public function hasMissingTokens();
+
     /**
      * Gets an api token associated with this account by it's name , e.g. "sso".
      *