Changes

Cater to the specific use-case that a user, who doesn't require data storage themselves, can login and upload on behalf of a linked account that they have been given upload rights to.

• Allow login with an account that doesn't have its own data storage attached
• Show only accounts for which it is valid to upload to

Example:

• User nodata has no data storage
• User data has data storage
• User data has given upload rights to User nodata
• User nodata logs into the uploader and the only valid option for uploading is User data