feat: add MAGIC_LINK_SECRET provider to AuthModule

Author: tomast1337

Diff for: server/src/auth/auth.module.ts

@@ -102,6 +102,12 @@ export class AuthModule {
           useFactory: (configService: ConfigService) =>
             configService.getOrThrow<string>('WHITELISTED_USERS'),
         },
+        {
+          inject: [ConfigService],
+          provide: 'MAGIC_LINK_SECRET',
+          useFactory: (configService: ConfigService) =>
+            configService.getOrThrow<string>('MAGIC_LINK_SECRET'),
+        },
         {
           inject: [ConfigService],
           provide: 'APP_DOMAIN',