✨ Add Medium Node (#788)

* add medium node

* minor fixes

* fix publication post

* fix according to feedback

* additional fixes

* fix license description

* ⚡ Small improvements

* ⚡ Improvements

Co-authored-by: ricardo <ricardoespinoza105@gmail.com>

packages/nodes-base/credentials/MediumOAuth2Api.credentials.ts

@@ -0,0 +1,60 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+export class MediumOAuth2Api implements ICredentialType {
+	name = 'mediumOAuth2Api';
+	extends = [
+		'oAuth2Api',
+	];
+	displayName = 'Medium OAuth2 API';
+	properties = [
+		{
+			displayName: 'Authorization URL',
+			name: 'authUrl',
+			type: 'hidden' as NodePropertyTypes,
+			default: 'https://medium.com/m/oauth/authorize',
+			required: true,
+		},
+		{
+			displayName: 'Access Token URL',
+			name: 'accessTokenUrl',
+			type: 'hidden' as NodePropertyTypes,
+			default: 'https://medium.com/v1/tokens',
+			required: true,
+		},
+		{
+			displayName: 'Scope',
+			name: 'scope',
+			type: 'hidden' as NodePropertyTypes,
+			default: 'basicProfile,publishPost,listPublications',
+		},
+		{
+			displayName: 'Client ID',
+			name: 'clientId',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+			required: true,
+		},
+		{
+			displayName: 'Client Secret',
+			name: 'clientSecret',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+			required: true,
+		},
+		{
+			displayName: 'Auth URI Query Parameters',
+			name: 'authQueryParameters',
+			type: 'hidden' as NodePropertyTypes,
+			default: '',
+		},
+		{
+			displayName: 'Authentication',
+			name: 'authentication',
+			type: 'hidden' as NodePropertyTypes,
+			default: 'body',
+		},
+	];
+}