Updated get_welcome_message function

Updated the get_welcome_message function to fall back on a string saved in a .env file and then to fall back on a simple default string.

models/env_service_model.py

@@ -56,18 +56,11 @@ class EnvService:
     
     @staticmethod
     def get_welcome_message():
-        # WELCOME_MESSAGE is a string used to welcome new members to the server.
-        #The string can be blank.
+        # WELCOME_MESSAGE is a default string used to welcome new members to the server if GPT3 is not available.
+        #The string can be blank but this is not advised. If a string cannot be found in the .env file, the below string is used.
         #The string is DMd to the new server member as part of an embed.
         try:
             welcome_message = os.getenv("WELCOME_MESSAGE")
         except:
-            welcome_message = None
-       
-        if welcome_message is None:
-            raise ValueError(
-                "WELCOME_MESSAGE is not defined properly in the environment file!"
-                "Please create a welcome message and put it into WELCOME_MESSAGE in the .env file."
-                'For example a line should look like: `WELCOME_MESSAGE:"Welcome to our server! We hop you enjoy it here."`'
-            )
+            welcome_message = "Hi there! Welcome to our Discord server!"
        return welcome_message