fix(repository): Move backend code into subdirectory

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

backend/src/api/private/users/users.controller.ts

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Controller, Get, Param } from '@nestjs/common';
+import { ApiTags } from '@nestjs/swagger';
+
+import { ConsoleLoggerService } from '../../../logger/console-logger.service';
+import { UserInfoDto } from '../../../users/user-info.dto';
+import { UsersService } from '../../../users/users.service';
+import { OpenApi } from '../../utils/openapi.decorator';
+
+@ApiTags('users')
+@Controller('users')
+export class UsersController {
+  constructor(
+    private readonly logger: ConsoleLoggerService,
+    private userService: UsersService,
+  ) {
+    this.logger.setContext(UsersController.name);
+  }
+
+  @Get(':username')
+  @OpenApi(200)
+  async getUser(@Param('username') username: string): Promise<UserInfoDto> {
+    return this.userService.toUserDto(
+      await this.userService.getUserByUsername(username),
+    );
+  }
+}