How can I approve members' request to join the community?

Summary:

We have an open community and 13 members are on the waitlist to get access to the community.

Content (required):

Created an open community for our course catalog. There are some managers and voluntary members. In addition to those, we have 13 members who requested access to join the community but I don't know how to approve/remove them. Is there a solution to allow them to join the community?

Version (include the version you are using, if applicable):

most recent version

Code Snippet (add any code snippets that support your topic, if applicable):