compass_app: failure to connect to remote/mock auth server in staging mode

[githubmonkey]

When running flutter run --target lib/main_staging.dart the app doesn't authenticate the mock user against the mock auth server which is running on localhost:8080

From the log:

[LoginViewModel] Login failed! SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 35158
[AuthRepositoryRemote] Error logging in: SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 52772
[LoginViewModel] Login failed! SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 52772
[AuthRepositoryRemote] Error logging in: SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 52782
[LoginViewModel] Login failed! SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 52782
[AuthRepositoryRemote] Error logging in: SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 55032
[LoginViewModel] Login failed! SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 55032
D/EGL_emulation( 3946): app_time_stats: avg=75.52ms min=2.63ms max=2734.61ms count=38

I verified that in AuthApiClient the correct host/port gets passed to HttpClient but it appears that later the port is ignored and HttpClient attempts to post to a random port.

samples/compass_app/app/lib/data/services/api/auth_api_client.dart

Line 28 in 42c081f

final request = await client.post(_host, _port, '/login');