diff --git a/src/auth/auth-token.entity.ts b/src/auth/auth-token.entity.ts
index 59fe5c82f..299b7df30 100644
--- a/src/auth/auth-token.entity.ts
+++ b/src/auth/auth-token.entity.ts
@@ -48,11 +48,8 @@ export class AuthToken {
     identifier: string,
     keyId: string,
     accessToken: string,
-    validUntil?: Date,
-  ): Pick<
-    AuthToken,
-    'user' | 'label' | 'keyId' | 'accessTokenHash' | 'createdAt' | 'validUntil'
-  > {
+    validUntil: Date,
+  ): Pick<AuthToken, 'user' | 'accessToken'> {
     const newToken = new AuthToken();
     newToken.user = user;
     newToken.label = identifier;
diff --git a/src/users/auth-token.dto.ts b/src/users/auth-token.dto.ts
new file mode 100644
index 000000000..c4fc8ffba
--- /dev/null
+++ b/src/users/auth-token.dto.ts
@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { IsNumber, IsString } from 'class-validator';
+
+export class AuthTokenDto {
+  @IsString()
+  label: string;
+  @IsNumber()
+  created: number;
+  @IsNumber()
+  validUntil: number | null;
+  @IsNumber()
+  lastUsed: number | null;
+}