/// <summary>
/// Acquires an access token from the authority on behalf of a user. It requires using a user token previously received.
/// </summary>
/// <param name="ctx">Authentication context instance</param>
/// <param name="resource">Identifier of the target resource that is the recipient of the requested token.</param>
/// <param name="clientAssertion">The client assertion to use for token acquisition.</param>
/// <param name="userAssertion">The user assertion (token) to use for token acquisition.</param>
/// <returns>It contains Access Token and the Access Token's expiration time.</returns>
public static async Task <AuthenticationResult> AcquireTokenAsync(this AuthenticationContext ctx,
string resource, ClientAssertion clientAssertion,
UserAssertion userAssertion)
{
return(await ctx.AcquireTokenOnBehalfCommonAsync(resource, new ClientKey(clientAssertion), userAssertion)
.ConfigureAwait(false));
}
