Add missing config parameter magic_link.validity_period

config/default.json5

@@ -40,4 +40,7 @@
         cache: false,
     },
     approval_mode: false,
+    magic_link: {
+        validity_period: 20,
+    },
 }

config/production.json5

@@ -13,4 +13,7 @@
         allow_invalid_tls: false
     },
     approval_mode: true,
+    magic_link: {
+        validity_period: 900,
+    }
 }