fix(core): Resolve User.roles field in GraphQL APIs (#3011)

packages/core/src/api/resolvers/entity/user-entity.resolver.ts

@@ -4,6 +4,7 @@ import { AuthenticationMethod as AuthenticationMethodType } from '@vendure/commo
 import { NATIVE_AUTH_STRATEGY_NAME } from '../../../config/auth/native-authentication-strategy';
 import { AuthenticationMethod } from '../../../entity/authentication-method/authentication-method.entity';
 import { ExternalAuthenticationMethod } from '../../../entity/authentication-method/external-authentication-method.entity';
+import { Role } from '../../../entity/role/role.entity';
 import { User } from '../../../entity/user/user.entity';
 import { UserService } from '../../../service/services/user.service';
 import { RequestContext } from '../../common/request-context';
@@ -32,4 +33,14 @@ export class UserEntityResolver {
             strategy: m instanceof ExternalAuthenticationMethod ? m.strategy : NATIVE_AUTH_STRATEGY_NAME,
         }));
     }
+
+    @ResolveField()
+    async roles(@Ctx() ctx: RequestContext, @Parent() user: User): Promise<Role[]> {
+        if (user.roles) {
+            return user.roles;
+        }
+        let roles: Role[] = [];
+        roles = await this.userService.getUserById(ctx, user.id).then(u => u?.roles ?? []);
+        return roles;
+    }
 }