Controllers/AuthController.cs

@@ -67,6 +67,18 @@ namespace qbridge.Controllers
         public async Task<IActionResult> GetAsync()
         {
             await GetQBDiscoveryDocument();
+            if (DiscoveryDoc == null)
+            {
+                return Content($"<h1>Error - Unable to fetch Discovery document from QuickBooks Online</h1>Cannot proceed");
+            }
+
+            var authorizationEndpoint = DiscoveryDoc["authorization_endpoint"].Value<string>();
+            if (string.IsNullOrWhiteSpace(authorizationEndpoint))
+            {
+                return Content($"<h1>Error - Unable to find AuthorizationEndpoint value in Discovery document from QuickBooks Online</h1>Cannot proceed");
+            }
+
+
             string url = string.Empty;
             var queryParams = new Dictionary<string, string>()
                 {
@@ -77,8 +89,7 @@ namespace qbridge.Controllers
                     {"state","MyUniqueStateID"}
                 };
 
-            url = Microsoft.AspNetCore.WebUtilities.QueryHelpers.AddQueryString("https://appcenter.intuit.com/connect/oauth2", queryParams);
-            // return Content($"AuthUrl: {url}");
+            url = Microsoft.AspNetCore.WebUtilities.QueryHelpers.AddQueryString(authorizationEndpoint, queryParams);           
             return Redirect(url);
 
             //will ask for login creds and permission then will redirect back to the Get method above with:
@@ -93,6 +104,15 @@ namespace qbridge.Controllers
 
         public async Task GetQBDiscoveryDocument()
         {
+            /*
+            
+            issuer:"https://oauth.platform.intuit.com/op/v1",
+   authorization_endpoint:"https://appcenter.intuit.com/connect/oauth2",
+   token_endpoint:"https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer",
+   userinfo_endpoint:"https://accounts.intuit.com/v1/openid_connect/userinfo",
+   revocation_endpoint:"https://developer.API.intuit.com/v2/oauth2/tokens/revoke",
+   jwks_uri:"https://oauth.platform.intuit.com/op/v1/jwks",
+             */
             var request = new HttpRequestMessage(HttpMethod.Get,
              "https://developer.api.intuit.com/.well-known/openid_sandbox_configuration");
             request.Headers.Add("Accept", "application/json");