Pins an item to a channel.

Required Params

• channel - Channel to pin the item in.

Optional Params

• file - File to pin.
• file_comment - File comment to pin.
• timestamp - Timestamp of the message to pin.

Errors the API can return:

• already_pinned - The specified item is already pinned to the channel.
• bad_timestamp - Value passed for timestamp was invalid.
• channel_not_found - The channel argument was not specified or was invalid
• file_comment_not_found - File comment specified by file_comment does not exist.
• file_not_found - File specified by file does not exist.
• file_not_shared - File specified by file is not public nor shared to the channel.
• message_not_found - Message specified by channel and timestamp does not exist.
• no_item_specified - One of file, file_comment, or timestamp was not specified.
• permission_denied - The user does not have permission to add pins to the channel.