update readme

.gitignore

@@ -160,3 +160,4 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
+*.swp

README.md

@@ -1,10 +1,18 @@
 # advent of code 2022
 
+Solutions for the advent of code 2022
+
 ## how to get input data
 
-* [python aocd library](https://pypi.org/project/advent-of-code-data/)
+- [python aocd library](https://pypi.org/project/advent-of-code-data/)
+    - Get the puzzle for day two: `puzzle = Puzzle(year=2022, day=2)`
+    - Submit a solution for day two part a: `submit(answer, part='a', day=2, year=2022)`
 
-## session token
+## how to add a session token
+
+- After a successful login extract your session token from your browser
+- Create a `.env` file and make sure to export the environment variable below
+- The lib will outomatically work if the environment variable is present
 
 ```bash
 $ cat .env