[914887] Unable to install Tiny Tiny RSS - authentication error?

Seems a bit odd that the following error is claiming password authentication given that I had to enter my credentials in order to install it (the user name and password listed in the error were not entered by me and they're not my credentials):

Error installing application: ('ttrss', '', 'Traceback (most recent call last):\n File "/usr/share/plinth/actions/ttrss", line 146, in \n main()\n File "/usr/share/plinth/actions/ttrss", line 142, in main\n subcommand_method(arguments)\n File "/usr/share/plinth/actions/ttrss", line 81, in subcommand_setup\n enable_api_access()\n File "/usr/share/plinth/actions/ttrss", line 101, in enable_api_access\n database=database, user=user, password=password, host=host)\n File "/usr/lib/python3/dist-packages/psycopg2/init.py", line 130, in connect\n conn = _connect(dsn, connection_factory=connection_factory, **kwasync)\npsycopg2.OperationalError: FATAL: password authentication failed for user "ttrss"\nFATAL: password authentication failed for user "ttrss"\n\n')