login register token logic is ready. Fixed also some syntax bugs

src/Security/TokenHandler.php

@@ -47,4 +47,12 @@ class TokenHandler
             }
         }
     }
+    public static function deleteTokensForUser(string $user)
+    {
+        for ($i = 0; $i < count(self::$tokens); ++$i) {
+            if (self::$tokens[$i][0] === $user) {
+                array_splice(self::$tokens, $i, 1);
+            }
+        }
+    }
 }