I have a Dropbox App in development. It needs to upload and download files for a given client account. This account is not my account that files are being uploaded and dowloaded to, it's the client(s) account. I see that if the App is in production a Dropbox user can give access to the App. However, as stated, my App is in dev. To go into production Dropbox says I need 50 users. So, given this information, how can I allow my client to allow my App access to their account to upload and download files. I need full control or near full control because my client is expecting files to be in folders that they specify i.e., they have a naming convention for where the files are. How can my client gain access to my App in dev and how can my App have the required functionality stated.