how to send push notification to multiple fcm tokens or registration_ids

 export const sendPush = async (params: any) => {

try {

let message = <any>{};

message.notification = {

title: params.title,

body: params.body,

data: params.data,

content_available: true,

priority: "high",

sound: "default",

};

message.data = params.data

message.registration_ids = [...new Set(params.token)];

return await fcm.send(message);

} catch (err) {

logger.logger.error(err)

return err;

}

}