I am having no luck getting Access Tokens created using my Administrator Account. I have all of the necessary permissions, REST is enabled, SuiteScript is enabled, Token Based Auth is enabled. When I go to add the Token, the Integration is there, but no users are showing to assign the token to. Am I missing some other setup piece? Thanks in advance!

To create a Token for you Admin user, set it up from link that appears in the frontpage

Best practice is to create an integration user with the integration role for an integration record.

Thanks @Edgar Valdés! I was actually attempting to follow the Best Practice as @Eric B suggested. But I'm not able to see any users, even when I setup an 'Integration Role' and assigned it to my user (which is what I have done on other integrations for other clients in production).

Does your role have "Login using Access Token" permission? If so, has the role been assigned to a user?

I wasn't able to create and/or edit user roles. I've gotten my client to grant the appropriate permissions/roles and this has been resolved. Thanks all