After having re-installed the Briar App on my second test handy, I made a typo in my Accountname: the first letter was originally upper-case, but by mistake I set up the accountname with lower case.

When re-adding the account on my first handy, I noticed now two accounts:

• accountname
• Accountname

I strongly suggest to allow only one "case" for accountnames, so that these become case-insensitive.