### 404 - Not Found

You may see the following error whilst connecting to your GitHub repository using the oAuth method.

```
GET https://api.github.com/repos/org-slug/repo-slug/keys?per_page=100: 404 - Not Found // See: https://docs.github.com/rest/reference/repos#list-deploy-keys
```

This error usually means the user you're connected as, does not have admin access to the repository you're trying to add. Further details on permissions can be found [here](https://docs.github.com/en/get-started/learning-about-github/access-permissions-on-github). 

### 422 - Validation Failed 

Alternatively, if you see the following error:

```
POST https://api.github.com/repos/org-slug/repo-slug/keys: 422 - Validation Failed
Error summary:
  resource: PublicKey
  code: custom
  field: key
  message: key is already in use // See: https://docs.github.com/rest/reference/repos#create-a-deploy-key
```

This would mean your project's public key, already exists within the repository. 

And the following would mean the project's webhook already exists in the repository:

```
 POST https://api.github.com/repos/org-slug/repo-slug/hooks: 422 - Validation Failed
Error summary:
  resource: Hook
  code: custom
  message: Hook already exists on this repository // See: https://docs.github.com/rest/reference/repos#create-a-repository-webhook
```

You could manually remove this and try adding the repository again, or alternatively, you could add the repository manually.