More refactoring

tests/base.py

@@ -16,10 +16,17 @@ password = "password"
 avatar_index = 1
 
 
+def get_headers(token=None):
+    if token:
+        return {"Authorization": f"Bearer {token}", "Content-Type": "application/json"}
+    else:
+        return {"Content-Type": "application/json"}
+
+
 async def register_user():
     response = client.post(
         "/register",
-        headers={"Content-Type": "application/json"},
+        headers=get_headers(),
         json={"username": username, "password": password, "avatar_index": avatar_index},
     )