feat: Read mail credentials from env

Close #1

main.py

@@ -1,8 +1,10 @@
 import argparse
+import os
 import secrets
 import smtplib
 import string
 import subprocess
+import sys
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
 
@@ -106,21 +108,24 @@ def create_user(
             mail_password,
         )
 
-
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description="Creates Yunohost user from a csv file and sends them an email with the password",
     )
     parser.add_argument("filename", help="Input file name")
-    parser.add_argument(
-        "mail_user", help="This user will be used to send the confirmation mail"
-    )
-    parser.add_argument(
-        "mail_password", help="This password will be used to send the confirmation mail"
-    )
     parser.add_argument("--dry-run", action="store_true")
     args = parser.parse_args()
 
+    mail_password = os.environ.get("MAIL_PASSWORD", None)
+    mail_user = os.environ.get("MAIL_USER", None)
+
+    if mail_user is None:
+        print("Missing environment variable: MAIL_USER")
+        sys.exit(1)
+    if mail_password is None:
+        print("Missing environment variable: MAIL_PASSWORD")
+        sys.exit(1)
+
     with open(args.filename, "r") as f:
         data = f.readlines()
 
@@ -131,7 +136,7 @@ if __name__ == "__main__":
         create_user(
             *line.strip().split(","),
             mail_text=email_text,
-            mail_user=args.mail_user,
-            mail_password=args.mail_password,
+            mail_user=mail_user,
+            mail_password=mail_password,
             dry_run=args.dry_run,
         )