The rabbitmqctl command with the list_users option can be used to list the user accounts.

rabbitmqctl list_users

Something like this should be returned. In this example, jane.doe has not been assigned any tags.

admin    [administrator]
john.doe [management]
jane.doe []

The --formatter json option can be used to return the output in JSON.

rabbitmqctl list_users --formatter json

The rabbitmqctl set_user_tags command can be used to update a users account to have a certain tag.

rabbitmqctl set_user_tags "jane.doe" management