/// <summary>
/// Initializes a new instance of the <see cref="AuthenticationProvider"/> class.
/// </summary>
/// <param name="tokenProvider">Provides the ability to request access tokens.</param>
/// <param name="customerId">Identifier for customer whose resources are being accessed.</param>
/// <param name="authorizationCode">The authorization code received from service authorization endpoint.</param>
/// <param name="redirectUri">Address to return to upon receiving a response from the authority.</param>
/// <exception cref="ArgumentException">
/// <paramref name="customerId"/> is empty or null.
/// or
/// <paramref name="authorizationCode"/> is empty or null.
/// </exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="tokenProvider"/> is null.
/// or
/// <paramref name="redirectUri"/> is null.
/// </exception>
public AuthenticationProvider(IAccessTokenProvider tokenProvider, string customerId, string authorizationCode, Uri redirectUri)
{
tokenProvider.AssertNotNull(nameof(tokenProvider));
customerId.AssertNotEmpty(nameof(customerId));
authorizationCode.AssertNotEmpty(nameof(authorizationCode));
redirectUri.AssertNotNull(nameof(redirectUri));
this.customerId = customerId;
this.authorizationCode = authorizationCode;
this.redirectUri = redirectUri;
this.tokenProvider = tokenProvider;
}