When I am creating a new connection in Compass in the connection dialog, and I use the SRV URI, and I type the following in:

mongodb://

I see the following message appearing below:

No username provided in authority section

While it is true that no username is provided in authority section, there is no requirement that one is provided at all. For example, in this case what I intended to type was

mongodb://localhost

As a user of Compass, I expect the stated message to only appear when the authority section has been fully entered (i.e. there's an @ sign in the input).