Provides the ability to retrieve a secret from Key Vault

Secret.cs

private static async Task<string> GetSecret(string uri, string name)
{
    /// <summary>
    /// Secret retrieval via Managed Service Identity (MSI).
    /// Link: https://docs.microsoft.com/en-us/azure/active-directory/managed-service-identity/overview
    /// </summary>
    AzureServiceTokenProvider provider = new AzureServiceTokenProvider();
    KeyVaultClient client = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(provider.KeyVaultTokenCallback));
    SecretBundle secret = await client.GetSecretAsync((uri + $"/Secrets/{name}"));
    string value = secret.Value;
    return value;
}