feat: implemented "SetAuthorization" method in Request

Author: sikelio

Web.Test/RequestTest.cs

@@ -104,6 +104,24 @@ public async Task SendWebpImageRequest()
 			await SendImageRequest("image/webp", "webp");
 		}
 
+		[TestMethod]
+		public void CheckHeaders()
+		{
+			Request request = new("");
+			request
+				.AddHeader("Authorization", "test1")
+				.SetAuthorization("test2")
+				.SetAuthorization("test3");
+
+            KeyValuePair<string, string>? authorizationHeader = request
+				.RequestHeaders
+				.Where(rh => rh.Key == "Authorization")
+				.FirstOrDefault();
+
+			Assert.IsNotNull(authorizationHeader, "Authorization header should be set");
+			Assert.AreEqual("test3", authorizationHeader.Value.Value, "Authorization header value should be: test3");
+		}
+
 		private async Task SendImageRequest(string acceptType, string imageType)
 		{
 			Request request = new(TestGetWebpImageUrl, HttpMethod.Get);

Web/API/Request.cs

@@ -124,6 +124,31 @@ public Request AddHeaders(Dictionary<string, string> headers)
             return this;
         }
 
+        /// <summary>
+        /// Sets the authorization header.
+        /// In case of an existing Authorization header, its value
+        /// will be replaced with the last set.
+        /// </summary>
+        /// <param name="value">Authorization header value</param>
+        /// <returns>Instance</returns>
+        public Request SetAuthorization(string value)
+        {
+            KeyValuePair<string, string>? existingAuthorization = RequestHeaders
+                .Where(rh => rh.Key == "Authorization")
+                .FirstOrDefault();
+
+            if (existingAuthorization == null)
+            {
+                AddHeader("Authorization", value);
+            }
+            else
+            {
+                RequestHeaders[existingAuthorization.Value.Key] = value;
+            }
+
+            return this;
+        }
+
         /// <summary>
         /// Adds a content header to the request
         /// </summary>