Specify error responses

Use error classes to specify the error codes and body.

src/modules/git/Git.service.ts

@@ -1,10 +1,15 @@
+import {constants} from 'http2';
 import * as codeCore from '@modal/code-core';
+import {HttpError} from '../../packages/fastify-compliant-http-errors';
 
 export interface GitService {
   createRepo(options: codeCore.git.CreateRepoData, user?: codeCore.common.User): Promise<codeCore.git.Repo>;
   deleteRepo(repoId: codeCore.git.Repo['id'], user?: codeCore.common.User): Promise<void>
 }
 
+export class UnableToCreateRepoError extends HttpError(constants.HTTP_STATUS_UNAUTHORIZED, 'Unable to Create Repo') {}
+export class UnableToDeleteRepoError extends HttpError(constants.HTTP_STATUS_UNAUTHORIZED, 'Unable to Delete Repo') {}
+
 export class GitServiceImpl implements GitService {
   private readonly coreGitService: codeCore.git.GitService;
 
@@ -16,13 +21,13 @@ export class GitServiceImpl implements GitService {
     if (user) {
       return this.coreGitService.create(options, user);
     }
-    throw new Error('Unauthorized');
+    throw new UnableToCreateRepoError('Unauthorized');
   }
 
   async deleteRepo(repoId: codeCore.git.Repo['id'], user?: codeCore.common.User): Promise<void> {
     if (user) {
       await this.coreGitService.delete(repoId, user);
     }
-    throw new Error('Unauthorized');
+    throw new UnableToDeleteRepoError('Unauthorized');
   }
 }