feat: Create NPM node (#6177)

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

@@ -0,0 +1,46 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class NpmApi implements ICredentialType {
+	name = 'npmApi';
+
+	displayName = 'Npm API';
+
+	documentationUrl = 'npm';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Access Token',
+			name: 'accessToken',
+			type: 'string',
+			typeOptions: { password: true },
+			default: '',
+		},
+		{
+			displayName: 'Registry Url',
+			name: 'registryUrl',
+			type: 'string',
+			default: 'https://registry.npmjs.org',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '=Bearer {{$credentials.accessToken}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.registryUrl}}',
+			url: '/-/whoami',
+		},
+	};
+}