htaccess and Routes fixed

app/Config/Routes.php

@@ -18,6 +18,7 @@ $routes->get('/', 'Main::index');
 
 // Login routes
 $routes->match(['get', 'post'], 'login', 'Login::index');
+$routes->match(['get', 'post'], 'login/', 'Login::index');
 $routes->get('login/logout', 'Login::logout');
 $routes->get('login/showVerify2fa', 'Login::showVerify2fa');
 $routes->post('login/verify2fa', 'Login::verify2fa');

public/.htaccess

@@ -14,7 +14,8 @@ Options All -Indexes
     # http://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewritebase
     # RewriteBase /
 
-    # Redirect Trailing Slashes...
+    # Redirect Trailing Slashes (only for GET requests to preserve POST data)
+    RewriteCond %{REQUEST_METHOD} GET
     RewriteCond %{REQUEST_FILENAME} !-d
     RewriteCond %{REQUEST_URI} (.+)/$
     RewriteRule ^ %1 [L,R=301]