Github authentication for `netlify init` is not working due to a regression.

[lukasholzer]

Describe the bug

A clear and concise description of what the bug is.

To Reproduce

Steps to reproduce the behavior:

1. remove the global ~/Library/Preferences/netlify/config.json
2. run netlify init in a new project
3. Select Authentication via netlify app
4. Use Github as the authentication method.
5. It will fail with 401 Bad Credentials

Regression was introduced with this change: https://github.com/netlify/cli/pull/3569/files#diff-f64dd88efec835a92fdd4fd9b786ef5faf32c0c732656935ec33a443efb2c912R39

The problem is that the return type of the getGitHubToken changed from Promise<Record<string, string>> to Promsie<URLSearchParams> which cannot be set inside the globalConfig.

Just to note (TypeScript would have prevented this)

Expected behavior

Authentication via Github should work

CLI Output

Adding deploy key to repository...
 ›   Error: Failed retrieving GitHub repository information with error: Bad credentials.

[tinfoil-knight]

@lukasholzer Can I take up this one? Was just working on figuring this out.

[lukasholzer]

Already fixed it just need to write a test for it 👍