updated README file

Author: githubofkrishnadhas

README.md

@@ -1,3 +1,58 @@
 # programatically-create-delete-update-github-repository-secrets
 programatically-create-delete-update-github-repository-secrets
 
+# Pre requesites
+* Personal Access Token (PAT) is the recommended way to authenticate. In this demo PAT is USED.
+* You can generate a new one from Github settings
+* You need to encrypt a secret before you can create or update secrets.
+
+
+# How code works for create or update a repository secret
+
+* First this will execute the `get_repository_public_key.py` `python program` to get the Organization public key and public key id
+    *  This public key is required and used for encryption of secret
+    * This public key id is required at time of creation or updation of secret
+
+    `Reference`: [get-a-repository-public-key](https://docs.github.com/en/rest/actions/secrets?apiVersion=2022-11-28#get-a-repository-public-key)
+
+
+* Then the `python program` `encrypt_using_libnacl` this uses the public key from step 1 and encrypts the secret 
+using the prefered method by GitHub.
+
+    `Reference`: [create-or-update-a-repository-secret](https://docs.github.com/en/rest/actions/secrets?apiVersion=2022-11-28#create-or-update-a-repository-secret)
+
+    - Reference used for encryption : [example-encrypting-a-secret-using-python](https://docs.github.com/en/rest/guides/encrypting-secrets-for-the-rest-api?apiVersion=2022-11-28#example-encrypting-a-secret-using-python )
+
+* Then `Python program` `create_or_update_repo_secret` is used to take the public key id from above step and encrypted secret value to create or update the secret.
+
+| status code | operation                |
+|-------------|--------------------------|
+| 201  | Response when creating a repository secret |
+| 204  | Response when updating a secret repository secret   |
+
+
+
+## Inputs of workflow
+
+| input name | description|
+|------------|------------|
+| organization | name of github organization |
+| repository_name | name of github repo where secret need to be created |
+| secret_name | organization Secret name |
+| secret_value | Secret value |
+
+
+# # How code works for deleting an repository secret
+
+* This runs the `python program` `delete_repo_secret.py` which takes 3 inputs from github workflow 
+1. organization name
+2. repository name 
+3. secret name
+
+* Then deletes the secret
+
+| input | description| 
+|-------|--------------|
+| organization | GitHub Organization name |
+| repository_name | name of github repo where secret need to be created |
+| secret_name | Secert to be deleted |