From my understanding of Mimosa’s CLI, it is designed to not be accessible to anyone besides them. Its just not the way Mimosa setup their radios to be managed. (I have been inside it while Mimosa was helping me with a few issues and is is more bare metal then Ubiquiti’s stuff.)
If you are looking to allow management for multiple users you should probably use the Cloud Management stuff available. You can create multiple accounts, invite them to your network and give/restrict some of the permissions. I have not played around with the user management side very much because I am about the only one in my office that does Mimosa Management.
If you want a bit more details for your network you can ask Mimosa for the extended cloud stuff, its alright if you want more information for hunting down issues and showing that customers are getting bandwidth if you are not using SNMP.