From 18313e11997b61d845f7755722096baf7a3f1c58 Mon Sep 17 00:00:00 2001
From: Ricardo Espinoza <ricardo@n8n.io>
Date: Sat, 12 Dec 2020 11:00:57 -0500
Subject: [PATCH] :zap: Now OAuth2 send authentication data in the body (#1241)

---
 packages/core/src/NodeExecuteFunctions.ts                     | 4 ++++
 .../nodes-base/credentials/MauticOAuth2Api.credentials.ts     | 2 +-
 packages/nodes-base/nodes/Mautic/GenericFunctions.ts          | 2 +-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/packages/core/src/NodeExecuteFunctions.ts b/packages/core/src/NodeExecuteFunctions.ts
index 1006b29100..e6bcbd24cb 100644
--- a/packages/core/src/NodeExecuteFunctions.ts
+++ b/packages/core/src/NodeExecuteFunctions.ts
@@ -172,6 +172,10 @@ export function requestOAuth2(this: IAllExecuteFunctions, credentialsType: strin
 						client_secret: credentials.clientSecret as string,
 					};
 					tokenRefreshOptions.body = body;
+					// Override authorization property so the credentails are not included in it
+					tokenRefreshOptions.headers = {
+						Authorization: '',
+					};
 				}
 
 				const newToken = await token.refresh(tokenRefreshOptions);
diff --git a/packages/nodes-base/credentials/MauticOAuth2Api.credentials.ts b/packages/nodes-base/credentials/MauticOAuth2Api.credentials.ts
index cea3276934..1a9fb99395 100644
--- a/packages/nodes-base/credentials/MauticOAuth2Api.credentials.ts
+++ b/packages/nodes-base/credentials/MauticOAuth2Api.credentials.ts
@@ -50,7 +50,7 @@ export class MauticOAuth2Api implements ICredentialType {
 			displayName: 'Authentication',
 			name: 'authentication',
 			type: 'hidden' as NodePropertyTypes,
-			default: 'header',
+			default: 'body',
 		},
 	];
 }
diff --git a/packages/nodes-base/nodes/Mautic/GenericFunctions.ts b/packages/nodes-base/nodes/Mautic/GenericFunctions.ts
index 9ab48b8dd8..d36add52df 100644
--- a/packages/nodes-base/nodes/Mautic/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Mautic/GenericFunctions.ts
@@ -63,7 +63,7 @@ export async function mauticApiRequest(this: IHookFunctions | IExecuteFunctions
 
 			options.uri = `${credentials.url}${options.uri}`;
 			//@ts-ignore
-			returnData = await this.helpers.requestOAuth2.call(this, 'mauticOAuth2Api', options);
+			returnData = await this.helpers.requestOAuth2.call(this, 'mauticOAuth2Api', options, { includeCredentialsOnRefreshOnBody: true });
 		}
 
 		if (returnData.errors) {