***
title: "CustomerGroupService"
generated: true
---------------
Contains methods relating to [CustomerGroup](/current/core/reference/typescript-api/entities/customer-group#customergroup) entities.
```ts title="Signature"
class CustomerGroupService {
constructor(connection: TransactionalConnection, listQueryBuilder: ListQueryBuilder, historyService: HistoryService, eventBus: EventBus, customFieldRelationService: CustomFieldRelationService)
findAll(ctx: RequestContext, options?: CustomerGroupListOptions, relations: RelationPaths = []) => Promise>;
findOne(ctx: RequestContext, customerGroupId: ID, relations: RelationPaths = []) => Promise;
getGroupCustomers(ctx: RequestContext, customerGroupId: ID, options?: CustomerListOptions) => Promise>;
create(ctx: RequestContext, input: CreateCustomerGroupInput) => Promise;
update(ctx: RequestContext, input: UpdateCustomerGroupInput) => Promise;
delete(ctx: RequestContext, id: ID) => Promise;
addCustomersToGroup(ctx: RequestContext, input: MutationAddCustomersToGroupArgs) => Promise;
removeCustomersFromGroup(ctx: RequestContext, input: MutationRemoveCustomersFromGroupArgs) => Promise;
}
```
### findAll
\
RequestContext, options?: CustomerGroupListOptions, relations: RelationPaths<CustomerGroup> = []) => Promise<PaginatedList<CustomerGroup>>`} />
### findOne
\RequestContext, customerGroupId: ID, relations: RelationPaths<CustomerGroup> = []) => Promise<CustomerGroup | undefined>`} />
### getGroupCustomers
\RequestContext, customerGroupId: ID, options?: CustomerListOptions) => Promise<PaginatedList<Customer>>`} />
Returns a [PaginatedList](/current/core/reference/typescript-api/common/paginated-list#paginatedlist) of all the Customers in the group.
### create
\RequestContext, input: CreateCustomerGroupInput) => Promise<CustomerGroup>`} />
### update
\RequestContext, input: UpdateCustomerGroupInput) => Promise<CustomerGroup>`} />
### delete
\RequestContext, id: ID) => Promise`} />
### addCustomersToGroup
\RequestContext, input: MutationAddCustomersToGroupArgs) => Promise<CustomerGroup>`} />
### removeCustomersFromGroup
\RequestContext, input: MutationRemoveCustomersFromGroupArgs) => Promise<CustomerGroup>`} />