Update a channel metacounter - When updating a specific item of a channel metacounter by its key
PUT {{baseUrl}}/v3/:channel_type/:channel_url/metacounter/:key
Update a channel metacounter
Updates existing items of a channel metacounter by their keys, or adds new items to the metacounter.
https://sendbird.com/docs/chat/v3/platform-api/guides/user-and-channel-metadata#2-update-a-channel-metacounter
channel_type
     Type: string
     Description: Specifies the type of the channel. Either openchannels or groupchannels.
 channel_url
     Type: string
     Description: Specifies the URL of the target channel.
HEADERS
| Key | Datatype | Required | Description | 
|---|---|---|---|
| Api-Token | string | (Required) | |
| Content-Type | string | ||
| Accept | string | 
RESPONSES
status: OK
"\u003cobject\u003e"