ENH Taking password in more secure way

server/scripts/createuser.py

 import sys
 import requests
-
+import getpass
 
 def create_user(server, admin_token, username, password):
     """
@@ -32,16 +32,16 @@ def create_user(server, admin_token, username, password):
 
 
 if __name__ == '__main__':
-    if len(sys.argv) < 5:
+    if len(sys.argv) < 4:
         print('Usage:')
         print('python createuser.py <server-address> <admin-token> '
-              '<username> <password>')
+              '<username>')
         exit(1)
 
     server = sys.argv[1]
     token = sys.argv[2]
     username = sys.argv[3]
-    password = sys.argv[4]
+    password = getpass.getpass("Password for {}: ".format(username))
 
     user = create_user(server, token, username, password)
     print('User {} successfully created, id: {}'.format(username, user['_id']))