Each Mesh has a unique URL that you can share with your Members. For help adding members see How to Add Members here.
Once you have added your Member's email address this is all they will need to gain access to your Mesh. You can either copy the URL and send it to your new Member or have your Usermesh automatically send them an invite from the Add Member page. Either way when they click on the URL they will be taken to a form to input their email address.
You can use the handy Copy URL button when on the Members page to share.
This is the form your new Members will see when they try to access your Mesh URL.
Upon first login they will receive a 6 digit code via email and then they are good to go.
After this they will be able to access your Mesh with just their email address.