Revert/Fix PLT-2805 (#3873)

api/command_msg.go

@@ -85,7 +85,7 @@ func (me *msgProvider) DoCommand(c *Context, channelId string, message string) *
 					post.Message = parsedMessage
 					post.ChannelId = targetChannelId
 					post.UserId = c.Session.UserId
-					if _, err := CreatePost(c.TeamId, post, true); err != nil {
+					if _, err := CreatePost(c, post, true); err != nil {
 						return &model.CommandResponse{Text: c.T("api.command_msg.fail.app_error"), ResponseType: model.COMMAND_RESPONSE_TYPE_EPHEMERAL}
 					}
 				}