test user internet connection (#567)

terminal.py

@@ -7,6 +7,7 @@ import os
 import sys
 from datetime import datetime
 from typing import List
+import socket
 import pandas as pd
 import yfinance as yf
 from alpha_vantage.timeseries import TimeSeries
@@ -490,6 +491,11 @@ Contexts:
 def terminal():
     """Terminal Menu"""
 
+    # Check if the user has internet connection
+    if socket.gethostbyname(socket.gethostname()) == "127.0.0.1":
+        print("Internet connection is needed to use Gamestonk Terminal.", "\n")
+        return
+
     bootup()
 
     ticker = ""  # "GME"