> ## Documentation Index
> Fetch the complete documentation index at: https://numadocs.secc.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Group Service

> Handles logic related to the `Group` model.

Namespace: [Numa.Services](numaservices)<br />
Related Models: [Group.cs](../models/group)<br />
Related Interfaces: `IGroupService.cs`

## Fields

| Field Name          | Type                             | Description                                                               |
| :------------------ | :------------------------------- | :------------------------------------------------------------------------ |
| `_dbContextFactory` | `IDbContextFactory<NumaContext>` | `DbContextFactory` for instantiating instances of `NumaContext` on-demand |

## Constructor

```csharp theme={null}
public GroupService( IDbContextFactory<NumaContext> dbContextFactory )
{
    _dbContextFactory = dbContextFactory ?? throw new ArgumentNullException( nameof( dbContextFactory ) );
}
```

## Properties

`GroupService` does not have any properties.

## Methods

| Method Name     | Description                                      | Parameters        | Return Type  |
| :-------------- | :----------------------------------------------- | :---------------- | :----------- |
| `UserIsInGroup` | Checks if a specific user is in a specific group | `string`,`string` | `Task<bool>` |

## IGroupService.cs

```csharp theme={null}
namespace Numa.Interfaces
{
    public interface IGroupService
    {
        Task<bool> UserIsInGroup( string userId, string groupId );
    }
}
```