I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.

I have been building a dashboard in retool to send a message to multiple selected users, but since slack api (https://slack.com/api/chat.postMessage) used to send message to a single user.