Implement a custom global exception hook

cli/__main__.py

@@ -1,5 +1,5 @@
 from core.Constants import Constants
-from core.Errors import MissingSubscriptionError, InvalidSubscriptionError
+from core.Errors import MissingSubscriptionError, InvalidSubscriptionError, UnknownConnectionTypeError
 from core.controllers.ApplicationController import ApplicationController
 from core.controllers.ApplicationVersionController import ApplicationVersionController
 from core.controllers.ClientController import ClientController
@@ -25,6 +25,7 @@ from typing import Optional, Union
 import argparse
 import pprint
 import re
+import sys
 
 if __name__ == '__main__':
 
@@ -80,6 +81,16 @@ if __name__ == '__main__':
 
         return candidate
 
+    def __handle_exception(identifier, message, traceback):
+
+        if issubclass(identifier, UnknownConnectionTypeError):
+            print('Please specify the desired connection method and try again.\n')
+
+        else:
+            sys.__excepthook__(identifier, message, traceback)
+
+    sys.excepthook = __handle_exception
+
     pristine_parser = argparse.ArgumentParser(add_help=False)
     pristine_parser.add_argument('--pristine', '-p', action='store_true')