diff --git a/interweb-server/src/main/java/de/l3s/interweb/server/features/user/UsersResource.java b/interweb-server/src/main/java/de/l3s/interweb/server/features/user/UsersResource.java
index 7f80c132..6fd88597 100644
--- a/interweb-server/src/main/java/de/l3s/interweb/server/features/user/UsersResource.java
+++ b/interweb-server/src/main/java/de/l3s/interweb/server/features/user/UsersResource.java
@@ -1,5 +1,7 @@
 package de.l3s.interweb.server.features.user;
 
+import java.util.Optional;
+
 import jakarta.inject.Inject;
 import jakarta.validation.Valid;
 import jakarta.validation.constraints.Email;
@@ -56,7 +58,7 @@ public class UsersResource {
         """;
 
     @ConfigProperty(name = "interweb.admin.email")
-    String adminEmail;
+    Optional<String> adminEmail;
 
     @ConfigProperty(name = "interweb.auto-approve.pattern")
     String autoApprovePattern;
@@ -91,8 +93,8 @@ public Uni<String> login(@NotEmpty @QueryParam("email") String email, @Context U
 
     private Uni<User> findOrCreateUser(String email) {
         return User.findByEmail(email).onItem().ifNull().switchTo(() -> createUser(email).call(user -> {
-            if (!user.approved) {
-                return mailer.send(Mail.withText(adminEmail, NEW_USER_EMAIL_SUBJECT, NEW_USER_EMAIL_BODY.formatted(user.email)));
+            if (!user.approved && adminEmail.isPresent()) {
+                return mailer.send(Mail.withText(adminEmail.get(), NEW_USER_EMAIL_SUBJECT, NEW_USER_EMAIL_BODY.formatted(user.email)));
             }
 
             return Uni.createFrom().voidItem();
diff --git a/interweb-server/src/main/resources/db/migration/V1.0.0__Interweb.sql b/interweb-server/src/main/resources/db/migration/V1.0.0__Interweb.sql
index 5b815e0b..b2ba4a4b 100644
--- a/interweb-server/src/main/resources/db/migration/V1.0.0__Interweb.sql
+++ b/interweb-server/src/main/resources/db/migration/V1.0.0__Interweb.sql
@@ -14,8 +14,8 @@ CREATE TABLE IF NOT EXISTS `chat`
 
 CREATE TABLE IF NOT EXISTS `chat_message`
 (
-    `chat_id` UUID             NOT NULL,
     `id`      BIGINT UNSIGNED  NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    `chat_id` UUID             NOT NULL,
     `role`    TINYINT UNSIGNED NOT NULL,
     `content` TEXT             NOT NULL,
     `created` DATETIME DEFAULT NOW(),
@@ -35,10 +35,10 @@ CREATE TABLE IF NOT EXISTS `user_token`
 (
     `id`          BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
     `user_id`     BIGINT UNSIGNED NOT NULL,
-    `apikey`      VARCHAR(64)     NOT NULL,
     `name`        VARCHAR(255)    NOT NULL,
     `url`         VARCHAR(512)  DEFAULT NULL,
     `description` VARCHAR(1024) DEFAULT NULL,
+    `apikey`      VARCHAR(64)     NOT NULL,
     UNIQUE KEY `index_user_token_apikey` (`apikey`),
     CONSTRAINT `fk_user_token_user` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
 );