Added a fix for failed logins to APRS-IS

This patch adds a check for a failed login to ARPS due to
LoginError.  This accounts for bad accounts or username/password
failures.  aprsd server will exit immediately upon failed login now.

aprsd/client.py

@@ -17,6 +17,8 @@ class Client:
     aprs_client = None
     config = None
 
+    connected = False
+
     def __new__(cls, *args, **kwargs):
         """This magic turns this into a singleton."""
         if cls._instance is None:
@@ -55,6 +57,10 @@ class Client:
                 aprs_client.connect()
                 connected = True
                 backoff = 1
+            except LoginError as e:
+                LOG.error("Failed to login to APRS-IS Server '{}'".format(e))
+                connected = False
+                raise e
             except Exception as e:
                 LOG.error("Unable to connect to APRS-IS server. '{}' ".format(e))
                 time.sleep(backoff)

aprsd/main.py

@@ -34,6 +34,7 @@ import time
 import aprsd
 from aprsd import client, email, messaging, plugin, threads, utils
 import aprslib
+from aprslib.exceptions import LoginError
 import click
 import click_completion
 import yaml
@@ -387,7 +388,11 @@ def server(loglevel, quiet, disable_validation, config_file, flush):
     # Create the initial PM singleton and Register plugins
     plugin_manager = plugin.PluginManager(config)
     plugin_manager.setup_plugins()
-    client.Client(config)
+    try:
+        cl = client.Client(config)
+        cl.setup_connection()
+    except LoginError:
+        sys.exit(-1)
 
     # Now load the msgTrack from disk if any
     if flush: