I am unable to get details of channel using Zoho REST API https://www.zoho.com/cliq/help/restapi/v2/#Channels_Retrieve_a_channel

I see the following error.

{
    "message": "Sorry! Looks like you are not part of this channel.",
    "code": "not_channel_user"
}

Also, I notice that I am not able to view all the channels of my organization as well.

I only see a couple. Do I need any additional permissions for that.