Hi! I am want to know how to assign embedded licences manually.

I am trying to complete a unit in lightning app badge and got the below mentioned error:-

"We’re having trouble with your Chat licenses, so we didn’t finish setting up Chat and Embedded Chat. Assign the licenses manually, and then set up Embedded Chat."

If someone can suggest me how to get the same assigned manually it wud be of atmost help.

Regards

Ashish