Добавлены публичные ключи для заверения что собеседника не подменили, также добавлена аватарка

db.py

@@ -0,0 +1,20 @@
+import os
+import json
+
+if not os.path.exists('db.json'):
+	db = {}
+	js = json.dumps(db, indent=2)
+	with open("db.json", "w") as outfile:
+		outfile.write(js)
+	print('Created new db.json')
+
+
+def read_db(file = 'db.json'):
+	with open(file, "r", encoding="utf-8") as openfile:
+		db = json.load(openfile)
+	return db
+
+def write_db(db, file = 'db.json'):
+	js = json.dumps(db, indent=2, ensure_ascii=False)
+	with open(file, "w", encoding="utf-8") as outfile:
+		outfile.write(js)