To let your clients better experience and access their photos, Huemn auto generates 2 types of PINs for each gallery. These PINs are editable.
Client PIN: 4-digit PIN for your direct clients. Gives them complete access, client control, and navigation through share settings. They can use the slideshow, download (either original or web-optimised photos, hide/unhide, favourite, and suggest edits feature. Along with this, they can lock/unlock albums, give album reviews and also change the 3-digit guest PIN as they please.
Further, they get to favourite multiple photos and create several selections of their own.
Guest PIN: 3-digit PIN for your client's guests. Gives them only the controls that your client gives permissions for. They can only play slideshow or download photos. They have no access over all the other features that your client gets.
Note that your clients will not have access to downloading original and/or web-optimised images, or the ability to suggest edits and/or review albums unless you don't enable those permissions for them.
Ultimately, it is the photographer who holds control over all permissions given to the clients.