/// <summary>
 /// Initializes new instance of this class based on the GSuite Engine instance.
 /// </summary>
 /// <param name="next">Next middleware instance.</param>
 /// <param name="GSuiteEngineCore">GSuite Engine instance.</param>
 public GSuiteEngineMiddleware(RequestDelegate next, GSuiteEngineCore engineCore)
 {
     this.engine = engineCore;
     this.next   = next;
 }