Function deriveOpenIdProviderConfigurationUrl

deriveOpenIdProviderConfigurationUrl(url: string | URL): URL
Derives the URL to openid-configuration from url that either points at the root URL of the provider or directly at .well-known/openid-configuration
Parameters
- url: string | URL
  an URL to the Open ID Connect provider
Returns URL
an URL to the .well-known/openid-configuration of the Open ID Connect provider
Example
```
if (url.endsWith('.well-known/openid-configuration')) {
  // `${url}` will be used to resolve the provider's configuration
} else {
  // `${url}/.well-known/openid-configuration` will be used to resolve the provider's configuration
}
```