fix(repository): Move backend code into subdirectory

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

backend/src/auth/auth-token.dto.ts

@@ -0,0 +1,44 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Type } from 'class-transformer';
+import { IsDate, IsNumber, IsOptional, IsString } from 'class-validator';
+
+import { BaseDto } from '../utils/base.dto.';
+import { TimestampMillis } from '../utils/timestamp';
+
+export class AuthTokenDto extends BaseDto {
+  @IsString()
+  label: string;
+
+  @IsString()
+  keyId: string;
+
+  @IsDate()
+  @Type(() => Date)
+  createdAt: Date;
+
+  @IsDate()
+  @Type(() => Date)
+  validUntil: Date;
+
+  @IsDate()
+  @Type(() => Date)
+  @IsOptional()
+  lastUsedAt: Date | null;
+}
+
+export class AuthTokenWithSecretDto extends AuthTokenDto {
+  @IsString()
+  secret: string;
+}
+
+export class AuthTokenCreateDto extends BaseDto {
+  @IsString()
+  label: string;
+
+  @IsNumber()
+  validUntil: TimestampMillis;
+}