# Sendbird UIKit SDK

**URL:** <https://community.sendbird.com/t/sendbird-uikit-sdk/335>\
**Category:** iOS\
**Tags:** group-channel\
**Created:** [May 29, 2020, 5:14pm UTC](https://community.sendbird.com/t/sendbird-uikit-sdk/335 "2020-05-29T17:14:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![darya.karneichuk](https://avatars.discourse-cdn.com/v4/letter/d/f19dbf/32.png) [@darya.karneichuk](https://community.sendbird.com/u/darya.karneichuk)\
**Post date:** [May 29, 2020, 5:14pm UTC](https://community.sendbird.com/t/sendbird-uikit-sdk/335/1 "2020-05-29T17:14:27Z")

</div>

I’ve faced the issue with signing up using Sendbird UIKit SDK

I’ve created a group channel from admin panel and then trying to connect to it from my code like that

appdelegate: (like on example)  
SBUMain.initialize(applicationId: Constants.sendBirdAppId)  
SBUGlobals.AccessToken = “”

vc:

SBUGlobals.CurrentUser = SBUUser(userId: userID, nickname: username)

SBUMain.connect { (user, error) in

```
            guard error == nil else { return }
            if error == nil {
                
                SBDGroupChannel.getWithUrl("Some url") { (channel, error) in

                    guard error == nil else { return }
                    
                    channel?.join(completionHandler: { (error) in
                    })
          }

```

}

But there is an issue

**Optional(Error Domain=Not authorized. “User must be a member.”. Code=400108 “(null)”)**

But how can I be a member if can’t join that?(

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<div class="post-metadata">

**Author:** ![Woo](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/woo/32/125_2.png) [@Woo](https://community.sendbird.com/u/Woo)\
**Post date:** [May 29, 2020, 5:43pm UTC](https://community.sendbird.com/t/sendbird-uikit-sdk/335/2 "2020-05-29T17:43:48Z")

</div>

@darya.karneichuk Hello! from dashboard, you can only create a group channel which is not a public. That means, users cannot join the channel unless a creator invites them.

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<div class="post-metadata">

**Author:** ![darya.karneichuk](https://avatars.discourse-cdn.com/v4/letter/d/f19dbf/32.png) [@darya.karneichuk](https://community.sendbird.com/u/darya.karneichuk)\
**Post date:** [June 2, 2020, 10:58am UTC](https://community.sendbird.com/t/sendbird-uikit-sdk/335/3 "2020-06-02T10:58:16Z")

</div>

I think it should be clear in the documentation. Thanks, your answer solved my issue